From b8ac781c05443f8a269a5fba828bbbfd3d7873f3 Mon Sep 17 00:00:00 2001
From: Mathieu Parent <math.parent@gmail.com>
Date: Thu, 1 Apr 2010 14:08:12 +0200
Subject: [PATCH] Skinny: Implement shared lines and more

- Shared lines (same line on several phones)
  + Active lines stored in db
- Separate SQL mutex per profile
- New event skinny::call_state
- Clean port_message
- More protocol understanding:
  + stimulus may have call_id
  + off_hook may have call_id
  + set_ringer may have call_id and line_instance
  + New DisplayPriNotifyMessage
- Use Cisco terms for Call state
  + Congestion -> LineInUse
  + CallRemoteMultiline -> InUseRemotely
- Add line_instance to Lines table (relative position contrary to
  absolute position)
- Less assertions as FS already does some
---
 src/mod/endpoints/mod_skinny/mod_skinny.c     | 560 +++++++----
 src/mod/endpoints/mod_skinny/mod_skinny.h     |  29 +-
 .../endpoints/mod_skinny/skinny_protocol.c    | 948 +++++++++++-------
 .../endpoints/mod_skinny/skinny_protocol.h    |  51 +-
 src/mod/endpoints/mod_skinny/skinny_tables.c  |   7 +-
 src/mod/endpoints/mod_skinny/skinny_tables.h  |   6 +-
 6 files changed, 977 insertions(+), 624 deletions(-)

diff --git a/src/mod/endpoints/mod_skinny/mod_skinny.c b/src/mod/endpoints/mod_skinny/mod_skinny.c
index 3107138b73..b8e304b8de 100644
--- a/src/mod/endpoints/mod_skinny/mod_skinny.c
+++ b/src/mod/endpoints/mod_skinny/mod_skinny.c
@@ -65,6 +65,7 @@ static char lines_sql[] =
 	"   device_name          VARCHAR(16),\n"
 	"   device_instance      INTEGER,\n"
 	"   position             INTEGER,\n"
+	"   line_instance        INTEGER,\n"
 	"   label                VARCHAR(40),\n"
 	"   value                VARCHAR(24),\n"
 	"   caller_name          VARCHAR(44),\n"
@@ -88,6 +89,16 @@ static char buttons_sql[] =
 	"   settings         VARCHAR(44)\n"
 	");\n";
 
+static char active_lines_sql[] =
+	"CREATE TABLE skinny_active_lines (\n"
+	"   device_name      VARCHAR(16),\n"
+	"   device_instance  INTEGER,\n"
+	"   line_instance    INTEGER,\n"
+	"   channel_uuid     VARCHAR(256),\n"
+	"   call_id          INTEGER,\n"
+	"   call_state       INTEGER\n"
+	");\n";
+
 /*****************************************************************************/
 /* PROFILES FUNCTIONS */
 /*****************************************************************************/
@@ -138,48 +149,106 @@ static switch_status_t skinny_profile_find_listener_by_device_name(skinny_profil
 	return SWITCH_STATUS_SUCCESS;
 }
 
-struct skinny_profile_find_listener_helper {
-	skinny_profile_t *profile;
-	listener_t *listener;
-	uint32_t line;
-};
-
-static int skinny_profile_find_listener_callback(void *pArg, int argc, char **argv, char **columnNames)
+switch_status_t skinny_profile_find_listener_by_device_name_and_instance(skinny_profile_t *profile, const char *device_name, uint32_t device_instance, listener_t **listener)
 {
-	struct skinny_profile_find_listener_helper *helper = pArg;
-	skinny_profile_t *profile = helper->profile;
-	char *device_name = argv[0];
-	/* uint32_t position = atoi(argv[1]); */
-	uint32_t relative_position = atoi(argv[2]);
-
-	skinny_profile_find_listener_by_device_name(profile, device_name, &helper->listener);
-
-	if(helper->listener) {
-		helper->line = relative_position;
+	switch_mutex_lock(profile->listener_mutex);
+	for (listener_t *l = profile->listeners; l; l = l->next) {
+		if (!strcmp(l->device_name, device_name) && (l->device_instance == device_instance)) {
+			*listener = l;
+		}
 	}
-	return 0;
+	switch_mutex_unlock(profile->listener_mutex);
+
+	return SWITCH_STATUS_SUCCESS;
 }
 
-static switch_status_t skinny_profile_find_listener_by_dest(skinny_profile_t *profile, const char *dest, listener_t **l, uint32_t *line)
+struct skinny_profile_find_session_uuid_helper {
+    skinny_profile_t *profile;
+	char *channel_uuid;
+	uint32_t line_instance;
+};
+
+int skinny_profile_find_session_uuid_callback(void *pArg, int argc, char **argv, char **columnNames)
 {
+	struct skinny_profile_find_session_uuid_helper *helper = pArg;
+
+	char *channel_uuid = argv[0];
+	uint32_t line_instance = atoi(argv[1]);
+
+    if(helper->channel_uuid == NULL) {
+        helper->channel_uuid = switch_mprintf("%s", channel_uuid);
+        helper->line_instance = line_instance;
+    }
+
+    return 0;
+}
+
+char * skinny_profile_find_session_uuid(skinny_profile_t *profile, listener_t *listener, uint32_t *line_instance_p, uint32_t call_id)
+{
+	struct skinny_profile_find_session_uuid_helper helper = {0};
 	char *sql;
-	struct skinny_profile_find_listener_helper helper = {0};
-	helper.profile = profile;
+	char *device_condition = NULL;
+	char *line_instance_condition = NULL;
+	char *call_id_condition = NULL;
 	
-	if ((sql = switch_mprintf("SELECT device_name, position, "
-								"(SELECT count(*) from skinny_lines sl2 "
-									"WHERE sl2.device_name= sl1.device_name AND sl2.device_instance= sl1.device_instance AND sl2.position <= sl1.position) AS relative_position "
-								"FROM skinny_lines sl1 WHERE value='%s'",
-								dest))) {
-		skinny_execute_sql_callback(profile, profile->listener_mutex, sql, skinny_profile_find_listener_callback, &helper);
+	switch_assert(profile);
+	helper.profile = profile;
+	helper.channel_uuid = NULL;
+	
+	if(listener) {
+	    device_condition = switch_mprintf("device_name='%s' AND device_instance=%d",
+	        listener->device_name, listener->device_instance);
+	} else {
+	    device_condition = switch_mprintf("1=1");
+	}
+	switch_assert(device_condition);
+	if(*line_instance_p > 0) {
+	    line_instance_condition = switch_mprintf("line_instance=%d", *line_instance_p);
+	} else {
+	    line_instance_condition = switch_mprintf("1=1");
+	}
+	switch_assert(line_instance_condition);
+	if(call_id > 0) {
+	    call_id_condition = switch_mprintf("call_id=%d", call_id);
+	} else {
+	    call_id_condition = switch_mprintf("1=1");
+	}
+	switch_assert(call_id_condition);
+	if((sql = switch_mprintf(
+			"SELECT channel_uuid, line_instance "
+				"FROM skinny_active_lines "
+				"WHERE %s AND %s AND %s "
+				"ORDER BY channel_uuid DESC",
+			device_condition, line_instance_condition, call_id_condition
+			))) {
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql,
+		    skinny_profile_find_session_uuid_callback, &helper);
 		switch_safe_free(sql);
 	}
+	switch_safe_free(device_condition);
+	switch_safe_free(line_instance_condition);
+	switch_safe_free(call_id_condition);
+	*line_instance_p = helper.line_instance;
+	return helper.channel_uuid;
+}
 
+switch_core_session_t * skinny_profile_find_session(skinny_profile_t *profile, listener_t *listener, uint32_t *line_instance_p, uint32_t call_id)
+{
+    char *uuid;
+    switch_core_session_t *result = NULL;
+    uuid = skinny_profile_find_session_uuid(profile, listener, line_instance_p, call_id);
 
-	*line = helper.line;
-	*l = helper.listener;
-	
-	return SWITCH_STATUS_SUCCESS;
+    if(!zstr(uuid)) {
+        /* TODO Why should we force? */
+        result = switch_core_session_force_locate(uuid);
+		if(!result) {
+		    switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, 
+		        "Unable to find session %s on %s:%d, line %d\n",
+		        uuid, listener->device_name, listener->device_instance, *line_instance_p);
+		}
+		switch_safe_free(uuid);
+    }
+    return result;
 }
 
 /*****************************************************************************/
@@ -262,28 +331,73 @@ switch_bool_t skinny_execute_sql_callback(skinny_profile_t *profile,
 /*****************************************************************************/
 /* CHANNEL FUNCTIONS */
 /*****************************************************************************/
-uint32_t skinny_line_perform_set_state(listener_t *listener, const char *file, const char *func, int line, uint32_t instance, uint32_t state, uint32_t call_id)
+void skinny_line_perform_set_state(const char *file, const char *func, int line, listener_t *listener, uint32_t line_instance, uint32_t call_id, uint32_t call_state)
 {
-	switch_assert(listener);
-	
+	switch_event_t *event = NULL;
+    switch_assert(listener);
+
+	skinny_device_event(listener, &event, SWITCH_EVENT_CUSTOM, SKINNY_EVENT_CALL_STATE);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Line-Instance", "%d", line_instance);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Call-Id", "%d", call_id);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Call-State", "%d", call_state);
+	switch_event_fire(&event);
 	switch_log_printf(SWITCH_CHANNEL_ID_LOG, file, func, line, NULL, SWITCH_LOG_DEBUG,
-		"Device %s, line %d State Change %s (%d) -> %s (%d) (no session)\n",
-		listener->device_name, instance,
-		skinny_soft_key_set2str(listener->line_state[instance]), listener->line_state[instance],
-		skinny_soft_key_set2str(state), state);
-
-	send_select_soft_keys(listener, instance, call_id, state, 0xffff);
-	listener->line_state[instance] = state;
-	
-	return listener->line_state[instance];
+		"Device %s:%d, Line %d, Call %d Change State to %s (%d)\n",
+		listener->device_name, listener->device_instance, line_instance, call_id,
+		skinny_call_state2str(call_state), call_state);	
 }
 
-uint32_t skinny_line_get_state(listener_t *listener, uint32_t instance)
+
+struct skinny_line_get_state_helper {
+	uint32_t call_state;
+};
+
+int skinny_line_get_state_callback(void *pArg, int argc, char **argv, char **columnNames)
 {
-	switch_assert(listener);
-
-	return listener->line_state[instance];
+	struct skinny_line_get_state_helper *helper = pArg;
+	helper->call_state = atoi(argv[0]);
+    return 0;
 }
+
+uint32_t skinny_line_get_state(listener_t *listener, uint32_t line_instance, uint32_t call_id)
+{
+    char *line_instance_condition;
+    char *call_id_condition;
+    char *sql;
+	struct skinny_line_get_state_helper helper = {0};
+
+    switch_assert(listener);
+    
+    if(line_instance > 0) {
+        line_instance_condition = switch_mprintf("line_instance=%d", line_instance);
+    } else {
+        line_instance_condition = switch_mprintf("1=1");
+    }
+    switch_assert(line_instance_condition);
+    if(call_id > 0) {
+        call_id_condition = switch_mprintf("call_id=%d", call_id);
+    } else {
+        call_id_condition = switch_mprintf("1=1");
+    }
+    switch_assert(call_id_condition);
+
+	if ((sql = switch_mprintf(
+			"SELECT call_state FROM skinny_active_lines "
+			"WHERE device_name='%s' AND device_instance=%d "
+			"AND %s AND %s",
+			listener->device_name, listener->device_instance,
+			line_instance_condition, call_id_condition
+			))) {
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_line_get_state_callback, &helper);
+		switch_safe_free(sql);
+	}
+	switch_safe_free(line_instance_condition);
+	switch_safe_free(call_id_condition);
+	
+	return helper.call_state;
+}
+
+
 switch_status_t skinny_tech_set_codec(private_t *tech_pvt, int force)
 {
 	int ms;
@@ -358,9 +472,7 @@ switch_status_t skinny_tech_set_codec(private_t *tech_pvt, int force)
 									   tech_pvt->read_impl.microseconds_per_packet,
 									   tech_pvt->read_impl.samples_per_packet
 									   ) != SWITCH_STATUS_SUCCESS) {
-			switch_channel_t *channel = NULL;
-			channel = switch_core_session_get_channel(tech_pvt->session);
-			assert(channel != NULL);
+			switch_channel_t *channel = switch_core_session_get_channel(tech_pvt->session);
 
 			switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
 			switch_goto_status(SWITCH_STATUS_FALSE, end);				
@@ -407,28 +519,19 @@ switch_status_t skinny_tech_set_codec(private_t *tech_pvt, int force)
 	return status;
 }
 
-void tech_init(private_t *tech_pvt, switch_core_session_t *session, listener_t *listener, uint32_t line)
+void tech_init(private_t *tech_pvt, skinny_profile_t *profile, switch_core_session_t *session)
 {
-	struct line_stat_res_message *button = NULL;
-
 	switch_assert(tech_pvt);
 	switch_assert(session);
-	switch_assert(listener);
 	
 	tech_pvt->read_frame.data = tech_pvt->databuf;
 	tech_pvt->read_frame.buflen = sizeof(tech_pvt->databuf);
 	switch_mutex_init(&tech_pvt->mutex, SWITCH_MUTEX_NESTED, switch_core_session_get_pool(session));
 	switch_mutex_init(&tech_pvt->flag_mutex, SWITCH_MUTEX_NESTED, switch_core_session_get_pool(session));
-	tech_pvt->call_id = listener->profile->next_call_id++;
-	tech_pvt->listener = listener;
-	tech_pvt->line = line;
+	tech_pvt->call_id = ++profile->next_call_id;
+	tech_pvt->profile = profile;
 	switch_core_session_set_private(session, tech_pvt);
 	tech_pvt->session = session;
-
-	skinny_line_get(listener, line, &button);
-	tech_pvt->line_name = switch_core_strdup(listener->pool, button->name);
-	tech_pvt->line_shortname = switch_core_strdup(listener->pool, button->shortname);
-	tech_pvt->line_displayname = switch_core_strdup(listener->pool, button->displayname);
 }
 
 /* 
@@ -438,14 +541,9 @@ void tech_init(private_t *tech_pvt, switch_core_session_t *session, listener_t *
 */
 switch_status_t channel_on_init(switch_core_session_t *session)
 {
-	switch_channel_t *channel;
-	private_t *tech_pvt = NULL;
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	private_t *tech_pvt = switch_core_session_get_private(session);
 
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
 	switch_set_flag_locked(tech_pvt, TFLAG_IO);
 
 	/* Move channel's state machine to ROUTING. This means the call is trying
@@ -464,14 +562,7 @@ switch_status_t channel_on_init(switch_core_session_t *session)
 
 switch_status_t channel_on_routing(switch_core_session_t *session)
 {
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
+    switch_channel_t *channel = switch_core_session_get_channel(session);
 
 	switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL ROUTING\n", switch_channel_get_name(channel));
 
@@ -480,15 +571,7 @@ switch_status_t channel_on_routing(switch_core_session_t *session)
 
 switch_status_t channel_on_execute(switch_core_session_t *session)
 {
-
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
+    switch_channel_t *channel = switch_core_session_get_channel(session);
 
 	switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL EXECUTE\n", switch_channel_get_name(channel));
 
@@ -498,13 +581,8 @@ switch_status_t channel_on_execute(switch_core_session_t *session)
 
 switch_status_t channel_on_destroy(switch_core_session_t *session)
 {
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	private_t *tech_pvt = switch_core_session_get_private(session);
 
 	if (tech_pvt) {
 		if (switch_core_codec_ready(&tech_pvt->read_codec)) {
@@ -521,73 +599,99 @@ switch_status_t channel_on_destroy(switch_core_session_t *session)
 	return SWITCH_STATUS_SUCCESS;
 }
 
+struct channel_on_hangup_helper {
+	private_t *tech_pvt;
+};
+
+int channel_on_hangup_callback(void *pArg, int argc, char **argv, char **columnNames)
+{
+	struct channel_on_hangup_helper *helper = pArg;
+	listener_t *listener = NULL;
+
+	char *device_name = argv[0];
+	uint32_t device_instance = atoi(argv[1]);
+	/* uint32_t position = atoi(argv[2]); */
+	uint32_t line_instance = atoi(argv[3]);
+	/* char *label = argv[4]; */
+	/* char *value = argv[5]; */
+	/* char *caller_name = argv[6]; */
+	/* uint32_t ring_on_idle = atoi(argv[7]); */
+	/* uint32_t ring_on_active = atoi(argv[8]); */
+	/* uint32_t busy_trigger = atoi(argv[9]); */
+	/* char *forward_all = argv[10]; */
+	/* char *forward_busy = argv[11]; */
+	/* char *forward_noanswer = argv[12]; */
+	/* uint32_t noanswer_duration = atoi(argv[13]); */
+	/* char *channel_uuid = argv[14]; */
+	uint32_t call_id = atoi(argv[15]);
+	uint32_t call_state = atoi(argv[16]);
+
+	skinny_profile_find_listener_by_device_name_and_instance(helper->tech_pvt->profile, device_name, device_instance, &listener);
+    if(listener) {
+        if(call_state == SKINNY_CONNECTED) {
+	        stop_tone(listener, line_instance, call_id);
+	    }
+        set_lamp(listener, SKINNY_BUTTON_LINE, line_instance, SKINNY_LAMP_OFF);
+        clear_prompt_status(listener, line_instance, call_id);
+        if(call_state == SKINNY_CONNECTED) { /* calling parties */
+		    close_receive_channel(listener,
+			    call_id, /* uint32_t conference_id, */
+			    helper->tech_pvt->party_id, /* uint32_t pass_thru_party_id, */
+			    call_id /* uint32_t conference_id2, */
+		    );
+		    stop_media_transmission(listener,
+			    call_id, /* uint32_t conference_id, */
+			    helper->tech_pvt->party_id, /* uint32_t pass_thru_party_id, */
+			    call_id /* uint32_t conference_id2, */
+		    );
+		    switch_mutex_lock(globals.calls_mutex);
+		    globals.calls--;
+		    if (globals.calls < 0) {
+			    globals.calls = 0;
+		    }
+		    switch_mutex_unlock(globals.calls_mutex);
+        
+	    }
+
+    	skinny_line_set_state(listener, line_instance, call_id, SKINNY_ON_HOOK);
+	    send_select_soft_keys(listener, line_instance, call_id, SKINNY_KEY_SET_ON_HOOK, 0xffff);
+        /* TODO: DefineTimeDate */
+        set_speaker_mode(listener, SKINNY_SPEAKER_OFF);
+        set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, 0, call_id);
+    
+    }
+    return 0;
+}
 
 switch_status_t channel_on_hangup(switch_core_session_t *session)
 {
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
-	listener_t *listener = NULL;
+	struct channel_on_hangup_helper helper = {0};
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	private_t *tech_pvt = switch_core_session_get_private(session);
+	char *sql;
 
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
-
-	listener = tech_pvt->listener;
-	assert(listener != NULL);
-	
 	switch_clear_flag_locked(tech_pvt, TFLAG_IO);
 	switch_clear_flag_locked(tech_pvt, TFLAG_VOICE);
 
 	switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL HANGUP\n", switch_channel_get_name(channel));
 
-	listener->session[tech_pvt->line] = NULL;
+    helper.tech_pvt= tech_pvt;
 
-	stop_tone(listener, tech_pvt->line, tech_pvt->call_id);
-	set_lamp(listener, SKINNY_BUTTON_LINE, tech_pvt->line, SKINNY_LAMP_OFF);
-	clear_prompt_status(listener, tech_pvt->line, tech_pvt->call_id);
-
-	if( skinny_line_get_state(tech_pvt->listener, tech_pvt->line) == SKINNY_KEY_SET_CONNECTED ) {
-		close_receive_channel(listener,
-			tech_pvt->call_id, /* uint32_t conference_id, */
-			tech_pvt->party_id, /* uint32_t pass_thru_party_id, */
-			tech_pvt->call_id /* uint32_t conference_id2, */
-		);
-		stop_media_transmission(listener,
-			tech_pvt->call_id, /* uint32_t conference_id, */
-			tech_pvt->party_id, /* uint32_t pass_thru_party_id, */
-			tech_pvt->call_id /* uint32_t conference_id2, */
-		);
-		switch_mutex_lock(globals.calls_mutex);
-		globals.calls--;
-		if (globals.calls < 0) {
-			globals.calls = 0;
-		}
-		switch_mutex_unlock(globals.calls_mutex);
+    skinny_session_walk_lines(tech_pvt->profile, switch_core_session_get_uuid(session), channel_on_hangup_callback, &helper);
+	if ((sql = switch_mprintf(
+			"DELETE FROM skinny_active_lines WHERE channel_uuid='%s'",
+			switch_core_session_get_uuid(session)
+			))) {
+		skinny_execute_sql(tech_pvt->profile, sql, tech_pvt->profile->sql_mutex);
+		switch_safe_free(sql);
 	}
-	send_call_state(listener,
-		SKINNY_ON_HOOK,
-		tech_pvt->line,
-		tech_pvt->call_id);
-	skinny_line_set_state(listener, tech_pvt->line, SKINNY_KEY_SET_ON_HOOK, tech_pvt->call_id);
-	/* TODO: DefineTimeDate */
-	set_speaker_mode(listener, SKINNY_SPEAKER_OFF);
-	set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, 0);
-
 	return SWITCH_STATUS_SUCCESS;
 }
 
 switch_status_t channel_kill_channel(switch_core_session_t *session, int sig)
 {
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	private_t *tech_pvt = switch_core_session_get_private(session);
 
 	switch (sig) {
 	case SWITCH_SIG_KILL:
@@ -631,16 +735,10 @@ switch_status_t channel_send_dtmf(switch_core_session_t *session, const switch_d
 
 switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id)
 {
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
+    switch_channel_t *channel = switch_core_session_get_channel(session);
+	private_t *tech_pvt = switch_core_session_get_private(session);
 	int payload = 0;
 
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
-
 	while (!(tech_pvt->read_codec.implementation && switch_rtp_ready(tech_pvt->rtp_session))) {
 		if (switch_channel_ready(channel)) {
 			switch_yield(10000);
@@ -705,17 +803,10 @@ switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_
 
 switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id)
 {
-	switch_channel_t *channel = NULL;
-	private_t *tech_pvt = NULL;
+	private_t *tech_pvt = switch_core_session_get_private(session);
 	//switch_frame_t *pframe;
 	switch_status_t status = SWITCH_STATUS_SUCCESS;
 	
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
-
 	if (!switch_test_flag(tech_pvt, TFLAG_IO)) {
 		return SWITCH_STATUS_FALSE;
 	}
@@ -737,31 +828,12 @@ switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame
 
 switch_status_t channel_answer_channel(switch_core_session_t *session)
 {
-	private_t *tech_pvt;
-	switch_channel_t *channel = NULL;
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
-
-
 	return SWITCH_STATUS_SUCCESS;
 }
 
 
 switch_status_t channel_receive_message(switch_core_session_t *session, switch_core_session_message_t *msg)
 {
-	switch_channel_t *channel;
-	private_t *tech_pvt;
-
-	channel = switch_core_session_get_channel(session);
-	assert(channel != NULL);
-
-	tech_pvt = (private_t *) switch_core_session_get_private(session);
-	assert(tech_pvt != NULL);
-
 	switch (msg->message_id) {
 	case SWITCH_MESSAGE_INDICATE_ANSWER:
 		{
@@ -788,8 +860,7 @@ switch_call_cause_t channel_outgoing_channel(switch_core_session_t *session, swi
 	
 	char *profile_name, *dest;
 	skinny_profile_t *profile = NULL;
-	listener_t *listener = NULL;
-	uint32_t line = 0;
+	char *sql;
 	char name[128];
 	switch_channel_t *channel;
 	switch_caller_profile_t *caller_profile;
@@ -833,26 +904,7 @@ switch_call_cause_t channel_outgoing_channel(switch_core_session_t *session, swi
 	channel = switch_core_session_get_channel(nsession);
 	switch_channel_set_name(channel, name);
 	
-
-	if ((skinny_profile_find_listener_by_dest(profile, dest, &listener, &line) != SWITCH_STATUS_SUCCESS)) {
-		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Problem while retrieving listener and line for destination %s in profile %s\n", dest, profile_name);
-		cause = SWITCH_CAUSE_UNALLOCATED_NUMBER;
-		goto error;
-	}
-	
-	if (!listener) {
-		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Invalid destination or phone not registred %s in profile %s\n", dest, profile_name);
-		cause = SWITCH_CAUSE_UNALLOCATED_NUMBER;
-		goto error;
-	}
-
-	if (line == 0) {
-		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Invalid destination or phone not registred %s in profile %s\n", dest, profile_name);
-		cause = SWITCH_CAUSE_UNALLOCATED_NUMBER;
-		goto error;
-	}
-	
-	tech_init(tech_pvt, nsession, listener, line);
+	tech_init(tech_pvt, profile, nsession);
 
 	caller_profile = switch_caller_profile_clone(nsession, outbound_profile);
 	switch_channel_set_caller_profile(channel, caller_profile);
@@ -861,19 +913,23 @@ switch_call_cause_t channel_outgoing_channel(switch_core_session_t *session, swi
 	switch_channel_set_flag(channel, CF_OUTBOUND);
 	switch_set_flag_locked(tech_pvt, TFLAG_OUTBOUND);
 
-	if(tech_pvt->listener->session[tech_pvt->line]) { /* Line is busy */
-		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Device line is busy %s in profile %s\n", dest, profile_name);
-		cause = SWITCH_CAUSE_USER_BUSY;
+	if ((sql = switch_mprintf(
+			"INSERT INTO skinny_active_lines "
+				"(device_name, device_instance, line_instance, channel_uuid, call_id, call_state) "
+				"SELECT device_name, device_instance, line_instance, '%s', %d, %d "
+				"FROM skinny_lines "
+				"WHERE value='%s'",
+			switch_core_session_get_uuid(nsession), tech_pvt->call_id, SKINNY_ON_HOOK, dest
+			))) {
+		skinny_execute_sql(profile, sql, profile->sql_mutex);
+		switch_safe_free(sql);
+	}
+	
+	cause = skinny_ring_lines(tech_pvt);
+	
+	if(cause != SWITCH_CAUSE_SUCCESS) {
 		goto error;
 	}
-	tech_pvt->listener->session[tech_pvt->line] = nsession;
-	send_call_state(tech_pvt->listener, SKINNY_RING_IN, tech_pvt->line, tech_pvt->call_id);
-	skinny_line_set_state(tech_pvt->listener, tech_pvt->line, SKINNY_KEY_SET_RING_IN, tech_pvt->call_id);
-	display_prompt_status(tech_pvt->listener, 0, "\200\027tel", tech_pvt->line, tech_pvt->call_id);
-	/* displayprinotifiymessage */
-	skinny_send_call_info(nsession);
-	set_lamp(tech_pvt->listener, SKINNY_BUTTON_LINE, tech_pvt->line, SKINNY_LAMP_BLINK);
-	set_ringer(tech_pvt->listener, SKINNY_RING_OUTSIDE, SKINNY_RING_FOREVER, 0);
 
 	*new_session = nsession;
 
@@ -1017,7 +1073,7 @@ static void flush_listener(listener_t *listener, switch_bool_t flush_log, switch
 				"DELETE FROM skinny_devices "
 					"WHERE name='%s' and instance=%d",
 				listener->device_name, listener->device_instance))) {
-			skinny_execute_sql(profile, sql, profile->listener_mutex);
+			skinny_execute_sql(profile, sql, profile->sql_mutex);
 			switch_safe_free(sql);
 		}
 
@@ -1025,7 +1081,7 @@ static void flush_listener(listener_t *listener, switch_bool_t flush_log, switch
 				"DELETE FROM skinny_lines "
 					"WHERE device_name='%s' and device_instance=%d",
 				listener->device_name, listener->device_instance))) {
-			skinny_execute_sql(profile, sql, profile->listener_mutex);
+			skinny_execute_sql(profile, sql, profile->sql_mutex);
 			switch_safe_free(sql);
 		}
 
@@ -1033,7 +1089,7 @@ static void flush_listener(listener_t *listener, switch_bool_t flush_log, switch
 				"DELETE FROM skinny_buttons "
 					"WHERE device_name='%s' and device_instance=%d",
 				listener->device_name, listener->device_instance))) {
-			skinny_execute_sql(profile, sql, profile->listener_mutex);
+			skinny_execute_sql(profile, sql, profile->sql_mutex);
 			switch_safe_free(sql);
 		}
 
@@ -1072,9 +1128,10 @@ static int dump_device_callback(void *pArg, int argc, char **argv, char **column
 static switch_status_t dump_device(skinny_profile_t *profile, const char *device_name, switch_stream_handle_t *stream)
 {
 	char *sql;
-	if ((sql = switch_mprintf("SELECT * FROM skinny_devices WHERE name LIKE '%s'",
+	if ((sql = switch_mprintf("SELECT name, user_id, instance, ip, type, max_streams, port, codec_string "
+			"FROM skinny_devices WHERE name='%s'",
 			device_name))) {
-		skinny_execute_sql_callback(profile, profile->listener_mutex, sql, dump_device_callback, stream);
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, dump_device_callback, stream);
 		switch_safe_free(sql);
 	}
 
@@ -1200,6 +1257,7 @@ static void *SWITCH_THREAD_FUNC listener_run(switch_thread_t *thread, void *obj)
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Connection Closed\n");
 	}
 
+    /* TODO
 	for(int line = 0 ; line < SKINNY_MAX_BUTTON_COUNT ; line++) {
 		if(listener->session[line]) {
 			switch_channel_clear_flag(switch_core_session_get_channel(listener->session[line]), CF_CONTROLLED);
@@ -1208,6 +1266,7 @@ static void *SWITCH_THREAD_FUNC listener_run(switch_thread_t *thread, void *obj)
 			destroy_pool = 0;
 		}
 	}
+	*/
 	if(destroy_pool == 0) {
 		goto no_destroy_pool;
 	}
@@ -1467,11 +1526,13 @@ static switch_status_t load_skinny_config(void)
 					switch_odbc_handle_exec(profile->master_odbc, devices_sql, NULL, NULL);
 					switch_odbc_handle_exec(profile->master_odbc, lines_sql, NULL, NULL);
 					switch_odbc_handle_exec(profile->master_odbc, buttons_sql, NULL, NULL);
+					switch_odbc_handle_exec(profile->master_odbc, active_lines_sql, NULL, NULL);
 				} else {
 					if ((db = switch_core_db_open_file(profile->dbname))) {
 						switch_core_db_test_reactive(db, "SELECT * FROM skinny_devices", NULL, devices_sql);
 						switch_core_db_test_reactive(db, "SELECT * FROM skinny_lines", NULL, lines_sql);
 						switch_core_db_test_reactive(db, "SELECT * FROM skinny_buttons", NULL, buttons_sql);
+						switch_core_db_test_reactive(db, "SELECT * FROM skinny_active_lines", NULL, active_lines_sql);
 					} else {
 						switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Cannot Open SQL Database!\n");
 						continue;
@@ -1479,9 +1540,10 @@ static switch_status_t load_skinny_config(void)
 					switch_core_db_close(db);
 				}
 				
-				skinny_execute_sql_callback(profile, profile->listener_mutex, "DELETE FROM skinny_devices", NULL, NULL);
-				skinny_execute_sql_callback(profile, profile->listener_mutex, "DELETE FROM skinny_lines", NULL, NULL);
-				skinny_execute_sql_callback(profile, profile->listener_mutex, "DELETE FROM skinny_buttons", NULL, NULL);
+				skinny_execute_sql_callback(profile, profile->sql_mutex, "DELETE FROM skinny_devices", NULL, NULL);
+				skinny_execute_sql_callback(profile, profile->sql_mutex, "DELETE FROM skinny_lines", NULL, NULL);
+				skinny_execute_sql_callback(profile, profile->sql_mutex, "DELETE FROM skinny_buttons", NULL, NULL);
+				skinny_execute_sql_callback(profile, profile->sql_mutex, "DELETE FROM skinny_active_lines", NULL, NULL);
 
 				switch_core_hash_insert(globals.profile_hash, profile->name, profile);
 				profile = NULL;
@@ -1528,7 +1590,7 @@ static switch_status_t cmd_profile_device_send_ringer_message(const char *profil
 		listener_t *listener = NULL;
 		skinny_profile_find_listener_by_device_name(profile, device_name, &listener);
 		if(listener) {
-			set_ringer(listener, skinny_str2ring_type(ring_type), skinny_str2ring_mode(ring_mode), 0);
+			set_ringer(listener, skinny_str2ring_type(ring_type), skinny_str2ring_mode(ring_mode), 0, 0);
 		} else {
 			stream->write_function(stream, "Listener not found!\n");
 		}
@@ -1707,8 +1769,55 @@ done:
 
 static void event_handler(switch_event_t *event)
 {
+	char *subclass;
+
 	if (event->event_id == SWITCH_EVENT_HEARTBEAT) {
 		walk_listeners(kill_expired_listener, NULL);
+	} else if ((subclass = switch_event_get_header_nil(event, "Event-Subclass")) && !strcasecmp(subclass, SKINNY_EVENT_CALL_STATE)) {
+    	char *profile_name = switch_event_get_header_nil(event, "Skinny-Profile-Name");
+    	char *device_name = switch_event_get_header_nil(event, "Skinny-Device-Name");
+    	uint32_t device_instance = atoi(switch_event_get_header_nil(event, "Skinny-Device-Instance"));
+		uint32_t line_instance = atoi(switch_event_get_header_nil(event, "Skinny-Line-Instance"));
+		uint32_t call_id = atoi(switch_event_get_header_nil(event, "Skinny-Call-Id"));
+		uint32_t call_state = atoi(switch_event_get_header_nil(event, "Skinny-Call-State"));
+	    skinny_profile_t *profile;
+    	listener_t *listener = NULL;
+        char *line_instance_condition, *call_id_condition;
+        char *sql;
+
+	    if ((profile = skinny_find_profile(profile_name))) {
+        	skinny_profile_find_listener_by_device_name_and_instance(profile, device_name, device_instance, &listener);
+            if(listener) {
+                if(line_instance > 0) {
+                    line_instance_condition = switch_mprintf("line_instance=%d", line_instance);
+                } else {
+                    line_instance_condition = switch_mprintf("1=1");
+                }
+                switch_assert(line_instance_condition);
+                if(call_id > 0) {
+                    call_id_condition = switch_mprintf("call_id=%d", call_id);
+                } else {
+                    call_id_condition = switch_mprintf("1=1");
+                }
+                switch_assert(call_id_condition);
+
+	            if ((sql = switch_mprintf(
+			            "UPDATE skinny_active_lines "
+			            "SET call_state=%d "
+			            "WHERE device_name='%s' AND device_instance=%d "
+			            "AND %s AND %s",
+			            call_state,
+			            listener->device_name, listener->device_instance,
+			            line_instance_condition, call_id_condition
+			            ))) {
+		            skinny_execute_sql(listener->profile, sql, listener->profile->sql_mutex);
+		            switch_safe_free(sql);
+		            send_call_state(listener, call_state, line_instance, call_id);
+	            }
+	            switch_safe_free(line_instance_condition);
+	            switch_safe_free(call_id_condition);
+	        }
+	    }
 	}
 }
 
@@ -1776,7 +1885,7 @@ static switch_status_t skinny_list_devices(const char *line, const char *cursor,
 
 	if(profile) {
 		if ((sql = switch_mprintf("SELECT name FROM skinny_devices"))) {
-			skinny_execute_sql_callback(profile, profile->listener_mutex, sql, skinny_list_devices_callback, &h);
+			skinny_execute_sql_callback(profile, profile->sql_mutex, sql, skinny_list_devices_callback, &h);
 			switch_safe_free(sql);
 		}
 	}
@@ -1904,6 +2013,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_skinny_load)
 		profile = (skinny_profile_t *) val;
 	
 		switch_mutex_init(&profile->listener_mutex, SWITCH_MUTEX_NESTED, module_pool);
+		switch_mutex_init(&profile->sql_mutex, SWITCH_MUTEX_NESTED, module_pool);
 		switch_mutex_init(&profile->sock_mutex, SWITCH_MUTEX_NESTED, module_pool);
 
 	}
@@ -1913,6 +2023,11 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_skinny_load)
 		/* Not such severe to prevent loading */
 	}
 
+	if ((switch_event_bind_removable(modname, SWITCH_EVENT_CUSTOM, SKINNY_EVENT_CALL_STATE, event_handler, NULL, &globals.call_state_node) != SWITCH_STATUS_SUCCESS)) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't bind our call_state handler!\n");
+		return SWITCH_STATUS_TERM;
+	}
+
 	if (switch_event_reserve_subclass(SKINNY_EVENT_REGISTER) != SWITCH_STATUS_SUCCESS) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't register subclass %s!\n", SKINNY_EVENT_REGISTER);
 		return SWITCH_STATUS_TERM;
@@ -1984,6 +2099,7 @@ SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_skinny_shutdown)
 
 	switch_event_free_subclass(SKINNY_EVENT_REGISTER);
 	switch_event_unbind(&globals.heartbeat_node);
+	switch_event_unbind(&globals.call_state_node);
 
 	globals.running = 0;
 
diff --git a/src/mod/endpoints/mod_skinny/mod_skinny.h b/src/mod/endpoints/mod_skinny/mod_skinny.h
index 88a5b70287..ffd8810642 100644
--- a/src/mod/endpoints/mod_skinny/mod_skinny.h
+++ b/src/mod/endpoints/mod_skinny/mod_skinny.h
@@ -42,6 +42,7 @@
 #define SKINNY_EVENT_UNREGISTER "skinny::unregister"
 #define SKINNY_EVENT_EXPIRE "skinny::expire"
 #define SKINNY_EVENT_ALARM "skinny::alarm"
+#define SKINNY_EVENT_CALL_STATE "skinny::call_state"
 
 struct skinny_globals {
 	/* data */
@@ -49,6 +50,7 @@ struct skinny_globals {
 	switch_mutex_t *calls_mutex;
 	switch_hash_t *profile_hash;
 	switch_event_node_t *heartbeat_node;
+	switch_event_node_t *call_state_node;
 	int running;
 };
 typedef struct skinny_globals skinny_globals_t;
@@ -72,6 +74,7 @@ struct skinny_profile {
 	char *odbc_user;
 	char *odbc_pass;
 	switch_odbc_handle_t *master_odbc;
+	switch_mutex_t *sql_mutex;	
 	/* stats */
 	uint32_t ib_calls;
 	uint32_t ob_calls;
@@ -103,8 +106,6 @@ struct listener {
 	skinny_profile_t *profile;
 	char device_name[16];
 	uint32_t device_instance;
-	switch_core_session_t *session[SKINNY_MAX_LINES];
-	uint32_t line_state[SKINNY_MAX_LINES]; /* See enum skinny_key_set */
 
 	switch_socket_t *sock;
 	switch_memory_pool_t *pool;
@@ -153,14 +154,11 @@ struct private_object {
 	switch_mutex_t *mutex;
 	switch_mutex_t *flag_mutex;
 	/* identification */
-	struct listener *listener;
-	uint32_t line;
 	uint32_t call_id;
 	uint32_t party_id;
-	char *line_name;
-	char *line_shortname;
-	char *line_displayname;
-	char dest[10];
+
+	skinny_profile_t *profile;
+
 	/* codec */
 	char *iananame;	
 	switch_codec_t read_codec;
@@ -182,6 +180,13 @@ struct private_object {
 
 typedef struct private_object private_t;
 
+/*****************************************************************************/
+/* PROFILES FUNCTIONS */
+/*****************************************************************************/
+switch_status_t skinny_profile_find_listener_by_device_name_and_instance(skinny_profile_t *profile, const char *device_name, uint32_t device_instance, listener_t **listener);
+char * skinny_profile_find_session_uuid(skinny_profile_t *profile, listener_t *listener, uint32_t *line_instance_p, uint32_t call_id);
+switch_core_session_t * skinny_profile_find_session(skinny_profile_t *profile, listener_t *listener, uint32_t *line_instance_p, uint32_t call_id);
+
 /*****************************************************************************/
 /* SQL FUNCTIONS */
 /*****************************************************************************/
@@ -197,13 +202,13 @@ switch_status_t keepalive_listener(listener_t *listener, void *pvt);
 /*****************************************************************************/
 /* CHANNEL FUNCTIONS */
 /*****************************************************************************/
-uint32_t skinny_line_perform_set_state(listener_t *listener, const char *file, const char *func, int line, uint32_t instance, uint32_t state, uint32_t call_id);
-#define  skinny_line_set_state(listener, instance, state, call_id)  skinny_line_perform_set_state(listener, __FILE__, __SWITCH_FUNC__, __LINE__, instance, state, call_id)
+void skinny_line_perform_set_state(const char *file, const char *func, int line, listener_t *listener, uint32_t line_instance, uint32_t call_id, uint32_t call_state);
+#define  skinny_line_set_state(listener, line_instance, call_id, call_state)  skinny_line_perform_set_state(__FILE__, __SWITCH_FUNC__, __LINE__, listener, line_instance, call_id, call_state)
 
-uint32_t skinny_line_get_state(listener_t *listener, uint32_t instance);
+uint32_t skinny_line_get_state(listener_t *listener, uint32_t line_instance, uint32_t call_id);
 
 switch_status_t skinny_tech_set_codec(private_t *tech_pvt, int force);
-void tech_init(private_t *tech_pvt, switch_core_session_t *session, listener_t *listener, uint32_t line);
+void tech_init(private_t *tech_pvt, skinny_profile_t *profile, switch_core_session_t *session);
 switch_status_t channel_on_init(switch_core_session_t *session);
 switch_status_t channel_on_hangup(switch_core_session_t *session);
 switch_status_t channel_on_destroy(switch_core_session_t *session);
diff --git a/src/mod/endpoints/mod_skinny/skinny_protocol.c b/src/mod/endpoints/mod_skinny/skinny_protocol.c
index a7438c05cc..7d1f448c55 100644
--- a/src/mod/endpoints/mod_skinny/skinny_protocol.c
+++ b/src/mod/endpoints/mod_skinny/skinny_protocol.c
@@ -218,23 +218,25 @@ int skinny_device_event_callback(void *pArg, int argc, char **argv, char **colum
 {
 	switch_event_t *event = (switch_event_t *) pArg;
 
-	char *device_name = argv[0];
-	char *user_id = argv[1];
-	char *instance = argv[2];
-	char *ip = argv[3];
-	char *device_type = argv[4];
-	char *max_streams = argv[5];
-	char *port = argv[6];
-	char *codec_string = argv[7];
+	char *profile_name = argv[0];
+	char *device_name = argv[1];
+	char *user_id = argv[2];
+	char *device_instance = argv[3];
+	char *ip = argv[4];
+	char *device_type = argv[5];
+	char *max_streams = argv[6];
+	char *port = argv[7];
+	char *codec_string = argv[8];
 
-	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Skinny-Device-Name", device_name);
-	switch_event_add_header(       event, SWITCH_STACK_BOTTOM, "Skinny-User-Id", "%s", user_id);
-	switch_event_add_header(       event, SWITCH_STACK_BOTTOM, "Skinny-Instance", "%s", instance);
-	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Skinny-IP", ip);
-	switch_event_add_header(       event, SWITCH_STACK_BOTTOM, "Skinny-Device-Type", "%s", device_type);
-	switch_event_add_header(       event, SWITCH_STACK_BOTTOM, "Skinny-Max-Streams", "%s", max_streams);
-	switch_event_add_header(       event, SWITCH_STACK_BOTTOM, "Skinny-Port", "%s", port);
-	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Skinny-Codecs", codec_string);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Profile-Name", "%s", profile_name);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Device-Name", "%s", device_name);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Station-User-Id", "%s", user_id);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Station-Instance", "%s", device_instance);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-IP-Address", "%s", ip);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Device-Type", "%s", device_type);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Max-Streams", "%s", max_streams);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Port", "%s", port);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Skinny-Codecs", "%s", codec_string);
 
 	return 0;
 }
@@ -249,8 +251,12 @@ switch_status_t skinny_device_event(listener_t *listener, switch_event_t **ev, s
 
 	switch_event_create_subclass(&event, event_id, subclass_name);
 	switch_assert(event);
-	if ((sql = switch_mprintf("SELECT * FROM skinny_devices WHERE name='%s' AND instance=%d", listener->device_name, listener->device_instance))) {
-		skinny_execute_sql_callback(profile, profile->listener_mutex, sql, skinny_device_event_callback, event);
+	if ((sql = switch_mprintf("SELECT '%s', name, user_id, instance, ip, type, max_streams, port, codec_string "
+	        "FROM skinny_devices "
+			"WHERE name='%s' AND instance=%d",
+			listener->profile->name,
+			listener->device_name, listener->device_instance))) {
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, skinny_device_event_callback, event);
 		switch_safe_free(sql);
 	}
 
@@ -259,30 +265,30 @@ switch_status_t skinny_device_event(listener_t *listener, switch_event_t **ev, s
 }
 
 /*****************************************************************************/
-switch_status_t skinny_send_call_info(switch_core_session_t *session)
+switch_status_t skinny_send_call_info(switch_core_session_t *session, listener_t *listener, uint32_t line_instance)
 {
 	private_t *tech_pvt;
 	switch_channel_t *channel;
-	listener_t *listener;
 	
 	char calling_party_name[40] = "UNKNOWN";
 	char calling_party[24] = "0000000000";
 	char called_party_name[40] = "UNKNOWN";
 	char called_party[24] = "0000000000";
 	
-	tech_pvt = switch_core_session_get_private(session);
-	switch_assert(tech_pvt != NULL);
 	channel = switch_core_session_get_channel(session);
-	switch_assert(channel != NULL);
-
-	listener = tech_pvt->listener;
-	switch_assert(listener != NULL);
+	tech_pvt = switch_core_session_get_private(session);
 
 	switch_assert(tech_pvt->caller_profile != NULL);
 	
 	if(	switch_channel_test_flag(channel, CF_OUTBOUND) ) {
-		strncpy(calling_party_name, tech_pvt->line_displayname, 40);
-		strncpy(calling_party, tech_pvt->line_name, 24);
+	    struct line_stat_res_message *button = NULL;
+
+	    skinny_line_get(listener, line_instance, &button);
+
+	    if (button) {
+		    strncpy(calling_party_name, button->displayname, 40);
+		    strncpy(calling_party, button->name, 24);
+	    }	
 		strncpy(called_party_name, tech_pvt->caller_profile->caller_id_name, 40);
 		strncpy(called_party, tech_pvt->caller_profile->caller_id_number, 24);
 	} else {
@@ -290,12 +296,12 @@ switch_status_t skinny_send_call_info(switch_core_session_t *session)
 		strncpy(calling_party, tech_pvt->caller_profile->caller_id_number, 24);
 		/* TODO called party */
 	}
-	send_call_info(tech_pvt->listener,
+	send_call_info(listener,
 		calling_party_name, /* char calling_party_name[40], */
 		calling_party, /* char calling_party[24], */
 		called_party_name, /* char called_party_name[40], */
 		called_party, /* char called_party[24], */
-		tech_pvt->line, /* uint32_t line_instance, */
+		line_instance, /* uint32_t line_instance, */
 		tech_pvt->call_id, /* uint32_t call_id, */
 		SKINNY_OUTBOUND_CALL, /* uint32_t call_type, */
 		"", /* TODO char original_called_party_name[40], */
@@ -316,169 +322,427 @@ switch_status_t skinny_send_call_info(switch_core_session_t *session)
 }
 
 /*****************************************************************************/
-switch_status_t skinny_create_session(listener_t *listener, uint32_t line, uint32_t to_state)
+switch_status_t skinny_session_walk_lines(skinny_profile_t *profile, char *channel_uuid, switch_core_db_callback_func_t callback, void *data)
 {
-	switch_core_session_t *session;
+	char *sql;
+	if ((sql = switch_mprintf(
+			"SELECT skinny_lines.*, channel_uuid, call_id, call_state "
+			"FROM skinny_active_lines "
+			"INNER JOIN skinny_lines "
+				"ON skinny_active_lines.device_name = skinny_lines.device_name "
+				"AND skinny_active_lines.device_instance = skinny_lines.device_instance "
+				"AND skinny_active_lines.line_instance = skinny_lines.line_instance "
+			"WHERE channel_uuid='%s'",
+			channel_uuid))) {
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, callback, data);
+		switch_safe_free(sql);
+	}
+	return SWITCH_STATUS_SUCCESS;
+}
+
+switch_status_t skinny_session_walk_lines_by_call_id(skinny_profile_t *profile, uint32_t call_id, switch_core_db_callback_func_t callback, void *data)
+{
+	char *sql;
+	if ((sql = switch_mprintf(
+			"SELECT skinny_lines.*, channel_uuid, call_id, call_state "
+			"FROM skinny_active_lines "
+			"INNER JOIN skinny_lines "
+				"ON skinny_active_lines.device_name = skinny_lines.device_name "
+				"AND skinny_active_lines.device_instance = skinny_lines.device_instance "
+				"AND skinny_active_lines.line_instance = skinny_lines.line_instance "
+			"WHERE call_id='%d'",
+			call_id))) {
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, callback, data);
+		switch_safe_free(sql);
+	}
+	return SWITCH_STATUS_SUCCESS;
+}
+
+/*****************************************************************************/
+struct skinny_ring_lines_helper {
+	private_t *tech_pvt;
+	uint32_t lines_count;
+};
+
+int skinny_ring_lines_callback(void *pArg, int argc, char **argv, char **columnNames)
+{
+	struct skinny_ring_lines_helper *helper = pArg;
+	char *tmp;
+
+	char *device_name = argv[0];
+	uint32_t device_instance = atoi(argv[1]);
+	/* uint32_t position = atoi(argv[2]); */
+	uint32_t line_instance = atoi(argv[3]);
+	/* char *label = argv[4]; */
+	/* char *value = argv[5]; */
+	/* char *caller_name = argv[6]; */
+	/* uint32_t ring_on_idle = atoi(argv[7]); */
+	/* uint32_t ring_on_active = atoi(argv[8]); */
+	/* uint32_t busy_trigger = atoi(argv[9]); */
+	/* char *forward_all = argv[10]; */
+	/* char *forward_busy = argv[11]; */
+	/* char *forward_noanswer = argv[12]; */
+	/* uint32_t noanswer_duration = atoi(argv[13]); */
+	/* char *channel_uuid = argv[14]; */
+	/* uint32_t call_id = atoi(argv[15]); */
+	/* uint32_t call_state = atoi(argv[16]); */
+
+	listener_t *listener = NULL;
+
+    skinny_profile_find_listener_by_device_name_and_instance(helper->tech_pvt->profile, 
+	    device_name, device_instance, &listener);
+	if(listener) {
+		helper->lines_count++;
+		skinny_line_set_state(listener, line_instance, helper->tech_pvt->call_id, SKINNY_RING_IN);
+		send_select_soft_keys(listener, line_instance, helper->tech_pvt->call_id, SKINNY_KEY_SET_RING_IN, 0xffff);
+	    if ((tmp = switch_mprintf("\200\027%s", helper->tech_pvt->caller_profile->destination_number))) {
+	        display_prompt_status(listener, 0, tmp, line_instance, helper->tech_pvt->call_id);
+		    switch_safe_free(tmp);
+	    }
+	    if ((tmp = switch_mprintf("\005\000\000\000%s", helper->tech_pvt->caller_profile->destination_number))) {
+    	    send_display_pri_notify(listener, 10 /* message_timeout */, 5 /* priority */, tmp);
+		    switch_safe_free(tmp);
+	    }
+		skinny_send_call_info(helper->tech_pvt->session, listener, line_instance);
+		set_lamp(listener, SKINNY_BUTTON_LINE, line_instance, SKINNY_LAMP_BLINK);
+		set_ringer(listener, SKINNY_RING_INSIDE, SKINNY_RING_FOREVER, 0, helper->tech_pvt->call_id);
+	}
+	return 0;
+}
+
+switch_call_cause_t skinny_ring_lines(private_t *tech_pvt)
+{
+	switch_status_t status;
+	struct skinny_ring_lines_helper helper = {0};
+
+	switch_assert(tech_pvt);
+	switch_assert(tech_pvt->profile);
+	switch_assert(tech_pvt->session);
+	
+	helper.tech_pvt = tech_pvt;
+	helper.lines_count = 0;
+	
+	status = skinny_session_walk_lines(tech_pvt->profile,
+	    switch_core_session_get_uuid(tech_pvt->session), skinny_ring_lines_callback, &helper);
+	if(status != SWITCH_STATUS_SUCCESS) {
+		return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
+	} else if(helper.lines_count == 0) {
+		return SWITCH_CAUSE_UNALLOCATED_NUMBER;
+	} else {
+		return SWITCH_CAUSE_SUCCESS;
+	}
+}
+
+/*****************************************************************************/
+switch_status_t skinny_create_ingoing_session(listener_t *listener, uint32_t *line_instance_p, switch_core_session_t **session)
+{
+	switch_core_session_t *nsession;
 	switch_channel_t *channel;
 	private_t *tech_pvt;
 	char name[128];
+	char *sql;
+	struct line_stat_res_message *button = NULL;
 
-	if(listener->session[line]) {
-		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "There is already a session on line %d of device %s\n",
-			line, listener->device_name);
+    if((nsession = skinny_profile_find_session(listener->profile, listener, line_instance_p, 0))) {
+        switch_core_session_rwunlock(nsession);
+        if(skinny_line_get_state(listener, *line_instance_p, 0) == SKINNY_OFF_HOOK) {
+            /* Reuse existing session */
+            *session = nsession;
+	        return SWITCH_STATUS_SUCCESS;
+        }
+        skinny_session_hold_line(nsession, listener, *line_instance_p);
+    }
+    if(*line_instance_p == 0) {
+        *line_instance_p = 1;
+    }
 
-		session = listener->session[line];
-
-		channel = switch_core_session_get_channel(session);
-		assert(channel != NULL);
-
-		tech_pvt = switch_core_session_get_private(session);
-		assert(tech_pvt != NULL);
-	} else {
-	
-		if (!(session = switch_core_session_request(skinny_get_endpoint_interface(), SWITCH_CALL_DIRECTION_INBOUND, NULL))) {
-			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Error Creating Session\n");
-			goto error;
-		}
-
-		if (!(tech_pvt = (struct private_object *) switch_core_session_alloc(session, sizeof(*tech_pvt)))) {
-			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Error Creating Session private object\n");
-			goto error;
-		}
-
-		switch_core_session_add_stream(session, NULL);
-
-		tech_init(tech_pvt, session, listener, line);
-
-		channel = switch_core_session_get_channel(session);
-
-		snprintf(name, sizeof(name), "SKINNY/%s/%s:%d/%d", listener->profile->name, listener->device_name, listener->device_instance, tech_pvt->line);
-		switch_channel_set_name(channel, name);
-
-		if (switch_core_session_thread_launch(session) != SWITCH_STATUS_SUCCESS) {
-			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Error Creating Session thread\n");
-			goto error;
-		}
-
-		if (!(tech_pvt->caller_profile = switch_caller_profile_new(switch_core_session_get_pool(session),
-																  NULL, listener->profile->dialplan, tech_pvt->line_displayname, tech_pvt->line_name, listener->remote_ip, NULL, NULL, NULL, "skinny" /* modname */, listener->profile->context, tech_pvt->dest)) != 0) {
-			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Error Creating Session caller profile\n");
-			goto error;
-		}
-
-		switch_channel_set_caller_profile(channel, tech_pvt->caller_profile);
+	skinny_line_get(listener, *line_instance_p, &button);
 
+	if (!button || !button->shortname) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Line %d not found on device %s %d\n",
+		    *line_instance_p, listener->device_name, listener->device_instance);
+		goto error;
 	}
 	
-	set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, 0);
+	if (!(nsession = switch_core_session_request(skinny_get_endpoint_interface(),
+	        SWITCH_CALL_DIRECTION_INBOUND, NULL))) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Error Creating Session\n");
+		goto error;
+	}
+
+	if (!(tech_pvt = (struct private_object *) switch_core_session_alloc(nsession, sizeof(*tech_pvt)))) {
+		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(nsession), SWITCH_LOG_CRIT, 
+		    "Error Creating Session private object\n");
+		goto error;
+	}
+
+	switch_core_session_add_stream(nsession, NULL);
+
+	tech_init(tech_pvt, listener->profile, nsession);
+
+	channel = switch_core_session_get_channel(nsession);
+
+	snprintf(name, sizeof(name), "SKINNY/%s/%s:%d/%d", listener->profile->name, 
+	    listener->device_name, listener->device_instance, *line_instance_p);
+	switch_channel_set_name(channel, name);
+
+	if (switch_core_session_thread_launch(nsession) != SWITCH_STATUS_SUCCESS) {
+		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(nsession), SWITCH_LOG_CRIT, 
+		    "Error Creating Session thread\n");
+		goto error;
+	}
+
+	if (!(tech_pvt->caller_profile = switch_caller_profile_new(switch_core_session_get_pool(nsession),
+													          NULL, listener->profile->dialplan, 
+													          button->shortname, button->name, 
+													          listener->remote_ip, NULL, NULL, NULL,
+													          "skinny" /* modname */,
+													          listener->profile->context, 
+													          "")) != 0) {
+	    switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(nsession), SWITCH_LOG_CRIT, 
+	                        "Error Creating Session caller profile\n");
+		goto error;
+	}
+
+	switch_channel_set_caller_profile(channel, tech_pvt->caller_profile);
+
+	if ((sql = switch_mprintf(
+			"INSERT INTO skinny_active_lines "
+				"(device_name, device_instance, line_instance, channel_uuid, call_id, call_state) "
+				"SELECT device_name, device_instance, line_instance, '%s', %d, %d "
+				"FROM skinny_lines "
+				"WHERE value='%s'",
+			switch_core_session_get_uuid(nsession), tech_pvt->call_id, SKINNY_ON_HOOK, button->shortname
+			))) {
+		skinny_execute_sql(listener->profile, sql, listener->profile->sql_mutex);
+		switch_safe_free(sql);
+	}
+
+	set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, 0, tech_pvt->call_id);
 	set_speaker_mode(listener, SKINNY_SPEAKER_ON);
-	set_lamp(listener, SKINNY_BUTTON_LINE, tech_pvt->line, SKINNY_LAMP_ON);
-	send_call_state(listener,
-		SKINNY_OFF_HOOK,
-		tech_pvt->line,
-		tech_pvt->call_id);
-	skinny_line_set_state(listener, tech_pvt->line, to_state, tech_pvt->call_id);
-	display_prompt_status(listener,
-		0,
-		"\200\000",
-		tech_pvt->line,
-		tech_pvt->call_id);
-	activate_call_plane(listener, tech_pvt->line);
-	start_tone(listener, SKINNY_TONE_DIALTONE, 0, tech_pvt->line, tech_pvt->call_id);
+	set_lamp(listener, SKINNY_BUTTON_LINE, *line_instance_p, SKINNY_LAMP_ON);
+    skinny_line_set_state(listener, *line_instance_p, tech_pvt->call_id, SKINNY_OFF_HOOK);
+    send_select_soft_keys(listener, *line_instance_p, tech_pvt->call_id, SKINNY_KEY_SET_OFF_HOOK, 0xffff);
+	display_prompt_status(listener, 0, "\200\000",
+		*line_instance_p, tech_pvt->call_id);
+	activate_call_plane(listener, *line_instance_p);
 
 	goto done;
 error:
-	if (session) {
-		switch_core_session_destroy(&session);
+	if (nsession) {
+		switch_core_session_destroy(&nsession);
 	}
 
 	return SWITCH_STATUS_FALSE;
 
 done:
-	listener->session[line] = session;
+    switch_core_session_rwunlock(nsession);
+	*session = nsession;
 	return SWITCH_STATUS_SUCCESS;
 }
 
-switch_status_t skinny_process_dest(listener_t *listener, uint32_t line)
+switch_status_t skinny_session_process_dest(switch_core_session_t *session, listener_t *listener, uint32_t line_instance, char *dest, char append_dest, uint32_t backspace)
 {
 	switch_channel_t *channel = NULL;
 	private_t *tech_pvt = NULL;
 
-	channel = switch_core_session_get_channel(listener->session[line]);
-	assert(channel != NULL);
+    switch_assert(session);
+    switch_assert(listener);
+    switch_assert(listener->profile);
+    
+	channel = switch_core_session_get_channel(session);
+	tech_pvt = switch_core_session_get_private(session);
 
-	tech_pvt = switch_core_session_get_private(listener->session[line]);
-	assert(tech_pvt != NULL);
-
-	tech_pvt->caller_profile->destination_number = switch_core_strdup(tech_pvt->caller_profile->pool, tech_pvt->dest);
-	if(strlen(tech_pvt->dest) >= 4) { /* TODO Number is complete -> check against dialplan */
-		if (switch_channel_get_state(channel) == CS_NEW) {
-			switch_channel_set_state(channel, CS_INIT);
-		}
-
-		send_dialed_number(listener, tech_pvt->dest, tech_pvt->line, tech_pvt->call_id);
-		skinny_answer(listener->session[line]);
+	if(!dest) {
+        if(append_dest == '\0') {/* no digit yet */
+    	    start_tone(listener, SKINNY_TONE_DIALTONE, 0, line_instance, tech_pvt->call_id);
+        } else {
+            if(strlen(tech_pvt->caller_profile->destination_number) == 0) {/* first digit */
+		        stop_tone(listener, line_instance, tech_pvt->call_id);
+                send_select_soft_keys(listener, line_instance, tech_pvt->call_id,
+                    SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT, 0xffff);
+            }
+            tech_pvt->caller_profile->destination_number = switch_core_sprintf(tech_pvt->caller_profile->pool,
+                "%s%c", tech_pvt->caller_profile->destination_number, append_dest);
+        }
+    } else {
+	    tech_pvt->caller_profile->destination_number = switch_core_strdup(tech_pvt->caller_profile->pool,
+	        dest);
+    }
+    /* TODO Number is complete -> check against dialplan */
+	if((strlen(tech_pvt->caller_profile->destination_number) >= 4) || dest) {
+		send_dialed_number(listener, tech_pvt->caller_profile->destination_number, line_instance, tech_pvt->call_id);
+        skinny_line_set_state(listener, line_instance, tech_pvt->call_id, SKINNY_PROCEED);
+	    skinny_send_call_info(session, listener, line_instance);
+        skinny_session_start_media(session, listener, line_instance);
 	}
+
+	switch_core_session_rwunlock(session);
+	
 	return SWITCH_STATUS_SUCCESS;
 }
 
-switch_status_t skinny_answer(switch_core_session_t *session)
+switch_status_t skinny_session_ring_out(switch_core_session_t *session, listener_t *listener, uint32_t line_instance)
 {
+	switch_channel_t *channel = NULL;
+	private_t *tech_pvt = NULL;
+
+    switch_assert(session);
+    switch_assert(listener);
+    switch_assert(listener->profile);
+    
+	channel = switch_core_session_get_channel(session);
+	tech_pvt = switch_core_session_get_private(session);
+
+    skinny_line_set_state(listener, line_instance, tech_pvt->call_id, SKINNY_RING_OUT);
+    send_select_soft_keys(listener, line_instance, tech_pvt->call_id,
+        SKINNY_KEY_SET_RING_OUT, 0xffff);
+	display_prompt_status(listener, 0, "\200\026",
+		line_instance, tech_pvt->call_id);
+    skinny_send_call_info(session, listener, line_instance);
+
+	switch_core_session_rwunlock(session);
+	
+	return SWITCH_STATUS_SUCCESS;
+}
+
+
+struct skinny_session_answer_helper {
 	private_t *tech_pvt;
 	listener_t *listener;
-	
-	tech_pvt = switch_core_session_get_private(session);
-	switch_assert(tech_pvt != NULL);
-	
-	listener = tech_pvt->listener;
-	switch_assert(listener != NULL);
+	uint32_t line_instance;
+};
 
-	set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, 0); /* TODO : here ? */
-	stop_tone(listener, tech_pvt->line, tech_pvt->call_id);
-	open_receive_channel(listener,
-		tech_pvt->call_id, /* uint32_t conference_id, */
-		0, /* uint32_t pass_thru_party_id, */
-		20, /* uint32_t packets, */
-		SKINNY_CODEC_ULAW_64K, /* uint32_t payload_capacity, */
-		0, /* uint32_t echo_cancel_type, */
-		0, /* uint32_t g723_bitrate, */
-		0, /* uint32_t conference_id2, */
-		0 /* uint32_t reserved[10] */
-	);
-	send_call_state(listener,
-		SKINNY_CONNECTED,
-		tech_pvt->line,
-		tech_pvt->call_id);
-	skinny_line_set_state(listener, tech_pvt->line, SKINNY_KEY_SET_CONNECTED, tech_pvt->call_id);
-	display_prompt_status(listener,
-		0,
-		"\200\030",
-		tech_pvt->line,
-		tech_pvt->call_id);
-	skinny_send_call_info(session);
+int skinny_session_answer_callback(void *pArg, int argc, char **argv, char **columnNames)
+{
+	struct skinny_session_answer_helper *helper = pArg;
+	listener_t *listener = NULL;
+
+	char *device_name = argv[0];
+	uint32_t device_instance = atoi(argv[1]);
+	/* uint32_t position = atoi(argv[2]); */
+	uint32_t line_instance = atoi(argv[3]);
+	/* char *label = argv[4]; */
+	/* char *value = argv[5]; */
+	/* char *caller_name = argv[6]; */
+	/* uint32_t ring_on_idle = atoi(argv[7]); */
+	/* uint32_t ring_on_active = atoi(argv[8]); */
+	/* uint32_t busy_trigger = atoi(argv[9]); */
+	/* char *forward_all = argv[10]; */
+	/* char *forward_busy = argv[11]; */
+	/* char *forward_noanswer = argv[12]; */
+	/* uint32_t noanswer_duration = atoi(argv[13]); */
+	/* char *channel_uuid = argv[14]; */
+	/* uint32_t call_id = atoi(argv[15]); */
+	/* uint32_t call_state = atoi(argv[16]); */
+
+	skinny_profile_find_listener_by_device_name_and_instance(helper->tech_pvt->profile, device_name, device_instance, &listener);
+    if(listener) {
+        if(!strcmp(device_name, helper->listener->device_name) 
+                && (device_instance == helper->listener->device_instance)
+                && (line_instance == helper->line_instance)) {/* the answering line */
+           	
+           	
+	        set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, 0, helper->tech_pvt->call_id);
+	        set_speaker_mode(listener, SKINNY_SPEAKER_ON);
+	        set_lamp(listener, SKINNY_BUTTON_LINE, line_instance, SKINNY_LAMP_ON);
+            skinny_line_set_state(listener, line_instance, helper->tech_pvt->call_id, SKINNY_OFF_HOOK);
+            /* send_select_soft_keys(listener, line_instance, helper->tech_pvt->call_id, SKINNY_KEY_SET_OFF_HOOK, 0xffff); */
+	        /* display_prompt_status(listener, 0, "\200\000",
+		        line_instance, tech_pvt->call_id); */
+	        activate_call_plane(listener, line_instance);
+        }
+    }
+    return 0;
+}
+
+switch_status_t skinny_session_answer(switch_core_session_t *session, listener_t *listener, uint32_t line_instance)
+{
+	struct skinny_session_answer_helper helper = {0};
+	switch_channel_t *channel = NULL;
+	private_t *tech_pvt = NULL;
+
+    switch_assert(session);
+    switch_assert(listener);
+    switch_assert(listener->profile);
+    
+	channel = switch_core_session_get_channel(session);
+	tech_pvt = switch_core_session_get_private(session);
+	
+    helper.tech_pvt = tech_pvt;
+    helper.listener = listener;
+    helper.line_instance = line_instance;
+
+    skinny_session_walk_lines(tech_pvt->profile, switch_core_session_get_uuid(session), skinny_session_answer_callback, &helper);
+
+	skinny_session_start_media(session, listener, line_instance);
+
+	switch_core_session_rwunlock(session);
+	
 	return SWITCH_STATUS_SUCCESS;
 }
 
-switch_status_t skinny_hold_line(listener_t *listener, uint32_t line)
+switch_status_t skinny_session_start_media(switch_core_session_t *session, listener_t *listener, uint32_t line_instance)
 {
 	switch_channel_t *channel = NULL;
 	private_t *tech_pvt = NULL;
 
-	channel = switch_core_session_get_channel(listener->session[line]);
-	assert(channel != NULL);
+    switch_assert(session);
+    switch_assert(listener);
+    switch_assert(listener->profile);
+    
+	channel = switch_core_session_get_channel(session);
+	tech_pvt = switch_core_session_get_private(session);
+     
+    stop_tone(listener, line_instance, tech_pvt->call_id);
+    open_receive_channel(listener,
+        tech_pvt->call_id, /* uint32_t conference_id, */
+        tech_pvt->call_id, /* uint32_t pass_thru_party_id, */
+        20, /* uint32_t packets, */
+        SKINNY_CODEC_ULAW_64K, /* uint32_t payload_capacity, */
+        0, /* uint32_t echo_cancel_type, */
+        0, /* uint32_t g723_bitrate, */
+        0, /* uint32_t conference_id2, */
+        0 /* uint32_t reserved[10] */
+    );
+    skinny_line_set_state(listener, line_instance, tech_pvt->call_id, SKINNY_CONNECTED);
+    send_select_soft_keys(listener, line_instance, tech_pvt->call_id,
+        SKINNY_KEY_SET_CONNECTED, 0xffff);
+    display_prompt_status(listener,
+        0,
+        "\200\030",
+        line_instance,
+        tech_pvt->call_id);
+    skinny_send_call_info(session, listener, line_instance);
 
-	tech_pvt = switch_core_session_get_private(listener->session[line]);
-	assert(tech_pvt != NULL);
+	switch_core_session_rwunlock(session);
+	
+	return SWITCH_STATUS_SUCCESS;
+}
 
+switch_status_t skinny_session_hold_line(switch_core_session_t *session, listener_t *listener, uint32_t line_instance)
+{
+	switch_channel_t *channel = NULL;
+	private_t *tech_pvt = NULL;
+
+    switch_assert(session);
+    switch_assert(listener);
+    switch_assert(listener->profile);
+    
+	channel = switch_core_session_get_channel(session);
+	tech_pvt = switch_core_session_get_private(session);
+		
 	/* TODO */
 	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Hold is not implemented yet. Hanging up the line.\n");
 
 	switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
 
+	switch_core_session_rwunlock(session);
+	
 	return SWITCH_STATUS_SUCCESS;
 }
 
-switch_status_t skinny_unhold_line(listener_t *listener, uint32_t line)
+switch_status_t skinny_session_unhold_line(switch_core_session_t *session, listener_t *listener, uint32_t line_instance)
 {
 	/* TODO */
 	return SWITCH_STATUS_SUCCESS;
@@ -525,7 +789,7 @@ void skinny_line_get(listener_t *listener, uint32_t instance, struct line_stat_r
 			instance,
 			listener->device_name, listener->device_instance
 			))) {
-		skinny_execute_sql_callback(listener->profile, listener->profile->listener_mutex, sql, skinny_line_get_callback, &helper);
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_line_get_callback, &helper);
 		switch_safe_free(sql);
 	}
 	*button = helper.button;
@@ -569,7 +833,7 @@ void skinny_speed_dial_get(listener_t *listener, uint32_t instance, struct speed
 			listener->device_name, listener->device_instance,
 			SKINNY_BUTTON_SPEED_DIAL
 			))) {
-		skinny_execute_sql_callback(listener->profile, listener->profile->listener_mutex, sql, skinny_speed_dial_get_callback, &helper);
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_speed_dial_get_callback, &helper);
 		switch_safe_free(sql);
 	}
 	*button = helper.button;
@@ -614,7 +878,7 @@ void skinny_service_url_get(listener_t *listener, uint32_t instance, struct serv
 			listener->device_instance,
 			SKINNY_BUTTON_SERVICE_URL
 			))) {
-		skinny_execute_sql_callback(listener->profile, listener->profile->listener_mutex, sql, skinny_service_url_get_callback, &helper);
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_service_url_get_callback, &helper);
 		switch_safe_free(sql);
 	}
 	*button = helper.button;
@@ -660,7 +924,7 @@ void skinny_feature_get(listener_t *listener, uint32_t instance, struct feature_
 			listener->device_instance,
 			SKINNY_BUTTON_SPEED_DIAL, SKINNY_BUTTON_SERVICE_URL
 			))) {
-		skinny_execute_sql_callback(listener->profile, listener->profile->listener_mutex, sql, skinny_feature_get_callback, &helper);
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_feature_get_callback, &helper);
 		switch_safe_free(sql);
 	}
 	*button = helper.button;
@@ -704,7 +968,8 @@ switch_status_t stop_tone(listener_t *listener,
 switch_status_t set_ringer(listener_t *listener,
 	uint32_t ring_type,
 	uint32_t ring_mode,
-	uint32_t unknown)
+	uint32_t line_instance,
+	uint32_t call_id)
 {
 	skinny_message_t *message;
 	message = switch_core_alloc(listener->pool, 12+sizeof(message->data.ringer));
@@ -712,7 +977,8 @@ switch_status_t set_ringer(listener_t *listener,
 	message->length = 4 + sizeof(message->data.ringer);
 	message->data.ringer.ring_type = ring_type;
 	message->data.ringer.ring_mode = ring_mode;
-	message->data.ringer.unknown = unknown;
+	message->data.ringer.line_instance = line_instance;
+	message->data.ringer.call_id = call_id;
 	skinny_send_reply(listener, message);
 	return SWITCH_STATUS_SUCCESS;
 }
@@ -990,8 +1256,24 @@ switch_status_t send_dialed_number(listener_t *listener,
 	return SWITCH_STATUS_SUCCESS;
 }
 
-switch_status_t send_reset(listener_t *listener,
-	uint32_t reset_type)
+switch_status_t send_display_pri_notify(listener_t *listener,
+	uint32_t message_timeout,
+	uint32_t priority,
+	char *notify)
+{
+	skinny_message_t *message;
+	message = switch_core_alloc(listener->pool, 12+sizeof(message->data.display_pri_notify));
+	message->type = DISPLAY_PRI_NOTIFY_MESSAGE;
+	message->length = 4 + sizeof(message->data.display_pri_notify);
+	message->data.display_pri_notify.message_timeout = message_timeout;
+	message->data.display_pri_notify.priority = priority;
+	strncpy(message->data.display_pri_notify.notify, notify, 32);
+	skinny_send_reply(listener, message);
+	return SWITCH_STATUS_SUCCESS;
+}
+
+
+switch_status_t send_reset(listener_t *listener, uint32_t reset_type)
 {
 	skinny_message_t *message;
 	message = switch_core_alloc(listener->pool, 12+sizeof(message->data.reset));
@@ -1078,7 +1360,7 @@ switch_status_t skinny_handle_register(listener_t *listener, skinny_message_t *r
 			request->data.reg.max_streams,
 			"" /* codec_string */
 			))) {
-		skinny_execute_sql(profile, sql, profile->listener_mutex);
+		skinny_execute_sql(profile, sql, profile->sql_mutex);
 		switch_safe_free(sql);
 	}
 
@@ -1090,6 +1372,7 @@ switch_status_t skinny_handle_register(listener_t *listener, skinny_message_t *r
 	if (xskinny) {
 		xbuttons = switch_xml_child(xskinny, "buttons");
 		if (xbuttons) {
+			uint32_t line_instance = 1;
 			for (xbutton = switch_xml_child(xbuttons, "button"); xbutton; xbutton = xbutton->next) {
 				uint32_t position = atoi(switch_xml_attr_soft(xbutton, "position"));
 				uint32_t type = skinny_str2button(switch_xml_attr_soft(xbutton, "type"));
@@ -1106,16 +1389,16 @@ switch_status_t skinny_handle_register(listener_t *listener, skinny_message_t *r
 					uint32_t noanswer_duration = atoi(switch_xml_attr_soft(xbutton, "noanswer-duration"));
 					if ((sql = switch_mprintf(
 							"INSERT INTO skinny_lines "
-								"(device_name, device_instance, position, "
+								"(device_name, device_instance, position, line_instance, "
 								"label, value, caller_name, "
 								"ring_on_idle, ring_on_active, busy_trigger, "
       							"forward_all, forward_busy, forward_noanswer, noanswer_duration) "
-								"VALUES('%s', %d, %d, '%s', '%s', '%s', %d, %d, %d, '%s', '%s', '%s', %d)",
-							request->data.reg.device_name, request->data.reg.instance, position,
+								"VALUES('%s', %d, %d, %d, '%s', '%s', '%s', %d, %d, %d, '%s', '%s', '%s', %d)",
+							request->data.reg.device_name, request->data.reg.instance, position, line_instance++,
 							label, value, caller_name,
 							ring_on_idle, ring_on_active, busy_trigger,
       						forward_all, forward_busy, forward_noanswer, noanswer_duration))) {
-						skinny_execute_sql(profile, sql, profile->listener_mutex);
+						skinny_execute_sql(profile, sql, profile->sql_mutex);
 						switch_safe_free(sql);
 					}
 				} else {
@@ -1131,7 +1414,7 @@ switch_status_t skinny_handle_register(listener_t *listener, skinny_message_t *r
 							label,
 							value,
 							settings))) {
-						skinny_execute_sql(profile, sql, profile->listener_mutex);
+						skinny_execute_sql(profile, sql, profile->sql_mutex);
 						switch_safe_free(sql);
 					}
 				}
@@ -1145,9 +1428,9 @@ switch_status_t skinny_handle_register(listener_t *listener, skinny_message_t *r
 	message = switch_core_alloc(listener->pool, 12+sizeof(message->data.reg_ack));
 	message->type = REGISTER_ACK_MESSAGE;
 	message->length = 4 + sizeof(message->data.reg_ack);
-	message->data.reg_ack.keepAlive = profile->keep_alive;
-	memcpy(message->data.reg_ack.dateFormat, profile->date_format, 6);
-	message->data.reg_ack.secondaryKeepAlive = profile->keep_alive;
+	message->data.reg_ack.keep_alive = profile->keep_alive;
+	memcpy(message->data.reg_ack.date_format, profile->date_format, 6);
+	message->data.reg_ack.secondary_keep_alive = profile->keep_alive;
 	skinny_send_reply(listener, message);
 
 	/* Send CapabilitiesReqMessage */
@@ -1227,7 +1510,7 @@ switch_status_t skinny_handle_config_stat_request(listener_t *listener, skinny_m
 			SKINNY_BUTTON_SPEED_DIAL,
 			listener->device_name
 			))) {
-		skinny_execute_sql_callback(profile, profile->listener_mutex, sql, skinny_config_stat_res_callback, message);
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, skinny_config_stat_res_callback, message);
 		switch_safe_free(sql);
 	}
 	skinny_send_reply(listener, message);
@@ -1287,10 +1570,10 @@ switch_status_t skinny_handle_capabilities_response(listener_t *listener, skinny
 			codec_string,
 			listener->device_name
 			))) {
-		skinny_execute_sql(profile, sql, profile->listener_mutex);
+		skinny_execute_sql(profile, sql, profile->sql_mutex);
 		switch_safe_free(sql);
 	}
-	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO,
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG,
 		"Codecs %s supported.\n", codec_string);
 	return SWITCH_STATUS_SUCCESS;
 }
@@ -1309,11 +1592,11 @@ switch_status_t skinny_handle_port_message(listener_t *listener, skinny_message_
 
 	if ((sql = switch_mprintf(
 			"UPDATE skinny_devices SET port=%d WHERE name='%s' and instance=%d",
-			request->data.as_uint16,
+			request->data.port.port,
 			listener->device_name,
 			listener->device_instance
 			))) {
-		skinny_execute_sql(profile, sql, profile->listener_mutex);
+		skinny_execute_sql(profile, sql, profile->sql_mutex);
 		switch_safe_free(sql);
 	}
 	return SWITCH_STATUS_SUCCESS;
@@ -1378,7 +1661,7 @@ switch_status_t skinny_handle_button_template_request(listener_t *listener, skin
 			SKINNY_BUTTON_UNDEFINED,
 			listener->device_name, listener->device_instance
 			))) {
-		skinny_execute_sql_callback(profile, profile->listener_mutex, sql, skinny_handle_button_template_request_callback, &helper);
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, skinny_handle_button_template_request_callback, &helper);
 		switch_safe_free(sql);
 	}
 	
@@ -1391,7 +1674,7 @@ switch_status_t skinny_handle_button_template_request(listener_t *listener, skin
 			SKINNY_BUTTON_LINE,
 			listener->device_name, listener->device_instance
 			))) {
-		skinny_execute_sql_callback(profile, profile->listener_mutex, sql, skinny_handle_button_template_request_callback, &helper);
+		skinny_execute_sql_callback(profile, profile->sql_mutex, sql, skinny_handle_button_template_request_callback, &helper);
 		switch_safe_free(sql);
 	}
 	
@@ -1464,7 +1747,7 @@ switch_status_t skinny_handle_soft_key_set_request(listener_t *listener, skinny_
 	skinny_send_reply(listener, message);
 
 	/* Init the states */
-	skinny_line_set_state(listener, 0, SKINNY_KEY_SET_ON_HOOK, 0);
+    send_select_soft_keys(listener, 0, 0, SKINNY_KEY_SET_ON_HOOK, 0xffff);
 	
 	return SWITCH_STATUS_SUCCESS;
 }
@@ -1596,173 +1879,128 @@ switch_status_t skinny_handle_keep_alive_message(listener_t *listener, skinny_me
 switch_status_t skinny_handle_soft_key_event_message(listener_t *listener, skinny_message_t *request)
 {
 	switch_status_t status = SWITCH_STATUS_SUCCESS;
-
-	skinny_profile_t *profile;
+	uint32_t line_instance = 0;
+	switch_core_session_t *session = NULL;
 	switch_channel_t *channel = NULL;
-	uint32_t line;
 	private_t *tech_pvt = NULL;
 
-
-	switch_assert(listener->profile);
-	switch_assert(listener->device_name);
-
-	profile = listener->profile;
-
+    switch_assert(listener);
+    switch_assert(listener->profile);
+    
 	skinny_check_data_length(request, sizeof(request->data.soft_key_event));
 
-	if(request->data.soft_key_event.line_instance) {
-		line = request->data.soft_key_event.line_instance;
-	} else {
-		line = 1;
-	}
-	/* Close/Hold busy lines */
-	for(int i = 0 ; i < SKINNY_MAX_BUTTON_COUNT ; i++) {
-		if(i == line) {
-			continue;
-		}
-		if(listener->session[i]) {
-			channel = switch_core_session_get_channel(listener->session[i]);
-			assert(channel != NULL);
-			if((skinny_line_get_state(listener, i) == SKINNY_KEY_SET_ON_HOOK)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_OFF_HOOK)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_RING_OUT)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_OFF_HOOK_WITH_FEATURES)) {
+	line_instance = request->data.soft_key_event.line_instance;
 
-				switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
-				channel = NULL;
-			} else if((skinny_line_get_state(listener, i) == SKINNY_KEY_SET_RING_IN)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_CONNECTED)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_CONNECTED_WITH_TRANSFER)
-					|| (skinny_line_get_state(listener, i) == SKINNY_KEY_SET_CONNECTED_WITH_CONFERENCE)) {
-				skinny_hold_line(listener, i);			
-			} /* remaining: SKINNY_KEY_SET_ON_HOLD */
-		}
+	switch(request->data.soft_key_event.event) {
+		case SOFTKEY_REDIAL:
+	        status = skinny_create_ingoing_session(listener, &line_instance, &session);
+
+		    skinny_session_process_dest(session, listener, line_instance, "redial", '\0', 0);
+			break;
+		case SOFTKEY_NEWCALL:
+	        status = skinny_create_ingoing_session(listener, &line_instance, &session);
+		    tech_pvt = switch_core_session_get_private(session);
+		    assert(tech_pvt != NULL);
+
+		    skinny_session_process_dest(session, listener, line_instance, NULL, '\0', 0);
+			break;
+		case SOFTKEY_HOLD:
+            session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.soft_key_event.call_id);
+
+		    if(session) {
+                status = skinny_session_hold_line(session, listener, line_instance);
+            }
+			break;
+		case SOFTKEY_ENDCALL:
+            session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.soft_key_event.call_id);
+
+		    if(session) {
+			    channel = switch_core_session_get_channel(session);
+
+			    switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
+            }
+			break;
+		case SOFTKEY_RESUME:
+            session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.soft_key_event.call_id);
+
+		    if(session) {
+                status = skinny_session_unhold_line(session, listener, line_instance);
+            }
+			break;
+		case SOFTKEY_ANSWER:
+            session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.soft_key_event.call_id);
+
+		    if(session) {
+    			status = skinny_session_answer(session, listener, line_instance);
+		    }
+			break;
+		default:
+			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING,
+				"Unknown SoftKeyEvent type while busy: %d.\n", request->data.soft_key_event.event);
 	}
+
+    if(session) {
+    	switch_core_session_rwunlock(session);
+    }
 	
-	if(!listener->session[line]) { /*the line is not busy */
-		switch(request->data.soft_key_event.event) {
-			case SOFTKEY_REDIAL:
-				skinny_create_session(listener, line, SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT);
-	
-				tech_pvt = switch_core_session_get_private(listener->session[line]);
-				assert(tech_pvt != NULL);
-		
-				strcpy(tech_pvt->dest, "redial");
-				skinny_process_dest(listener, line);
-				break;
-			case SOFTKEY_NEWCALL:
-				skinny_create_session(listener, line, SKINNY_KEY_SET_OFF_HOOK);
-				break;
-			default:
-				switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING,
-					"Unknown SoftKeyEvent type while not busy: %d.\n", request->data.soft_key_event.event);
-		}
-	} else { /* the line is busy */
-		if(skinny_line_get_state(listener, line) == SKINNY_KEY_SET_ON_HOLD) {
-			skinny_unhold_line(listener, line);			
-		}
-		switch(request->data.soft_key_event.event) {
-			case SOFTKEY_ANSWER:
-				skinny_answer(listener->session[line]);
-				break;
-			case SOFTKEY_ENDCALL:
-				channel = switch_core_session_get_channel(listener->session[line]);
-				assert(channel != NULL);
-
-				switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
-
-				break;
-			default:
-				switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING,
-					"Unknown SoftKeyEvent type while busy: %d.\n", request->data.soft_key_event.event);
-		}
-	}
 	return status;
 }
 
 switch_status_t skinny_handle_off_hook_message(listener_t *listener, skinny_message_t *request)
 {
-	skinny_profile_t *profile;
-	uint32_t line;
-
-	switch_assert(listener->profile);
-	switch_assert(listener->device_name);
-
-	profile = listener->profile;
+	uint32_t line_instance;
+	switch_core_session_t *session = NULL;
+	private_t *tech_pvt = NULL;
 
 	skinny_check_data_length(request, sizeof(request->data.off_hook));
 
-	if(request->data.off_hook.line_instance) {
-		line = request->data.off_hook.line_instance;
+	if(request->data.off_hook.line_instance > 0) {
+		line_instance = request->data.off_hook.line_instance;
 	} else {
-		line = 1;
+		line_instance = 1;
 	}
-	if(listener->session[line]) { /*answering a call */
-		skinny_answer(listener->session[line]);
+
+    session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.off_hook.call_id);
+
+	if(session) { /*answering a call */
+		skinny_session_answer(session, listener, line_instance);
 	} else { /* start a new call */
-		skinny_create_session(listener, line, SKINNY_KEY_SET_OFF_HOOK);
+		skinny_create_ingoing_session(listener, &line_instance, &session);
+	    tech_pvt = switch_core_session_get_private(session);
+	    assert(tech_pvt != NULL);
+
+	    skinny_session_process_dest(session, listener, line_instance, NULL, '\0', 0);
 	}
 	return SWITCH_STATUS_SUCCESS;
 }
 
 switch_status_t skinny_handle_stimulus_message(listener_t *listener, skinny_message_t *request)
 {
-	skinny_profile_t *profile;
 	struct speed_dial_stat_res_message *button = NULL;
-	uint32_t line = 0;
-	private_t *tech_pvt = NULL;
+	uint32_t line_instance = 0;
+	uint32_t call_id = 0;
+	switch_core_session_t *session = NULL;
 
-	switch_assert(listener->profile);
-	switch_assert(listener->device_name);
+	skinny_check_data_length(request, sizeof(request->data.stimulus)-sizeof(request->data.stimulus.call_id));
 
-	profile = listener->profile;
-
-	skinny_check_data_length(request, sizeof(request->data.stimulus));
-
-	if(request->data.stimulus.instance_type == SKINNY_BUTTON_LINE) {/* Choose the specified line */
-		line = request->data.stimulus.instance;
-	}
-	if(line == 0) {/* If none, find the first busy line */
-		for(int i = 0 ; i < SKINNY_MAX_BUTTON_COUNT ; i++) {
-			if(listener->session[i]) {
-				line = i;
-				break;
-			}
-		}
-	}
-	if(line == 0) {/* If none, choose the first line */
-		line = 1;
+	if(skinny_check_data_length_soft(request, sizeof(request->data.stimulus))) {
+	    call_id = request->data.stimulus.call_id;
 	}
+
 	switch(request->data.stimulus.instance_type) {
 		case SKINNY_BUTTON_LAST_NUMBER_REDIAL:
-			skinny_create_session(listener, line, SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT);
-
-			tech_pvt = switch_core_session_get_private(listener->session[line]);
-			assert(tech_pvt != NULL);
-	
-			strcpy(tech_pvt->dest, "redial");
-			skinny_process_dest(listener, line);
+		    skinny_create_ingoing_session(listener, &line_instance, &session);
+			skinny_session_process_dest(session, listener, line_instance, "redial", '\0', 0);
 			break;
 		case SKINNY_BUTTON_VOICEMAIL:
-			skinny_create_session(listener, line, SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT);
-	
-			tech_pvt = switch_core_session_get_private(listener->session[line]);
-			assert(tech_pvt != NULL);
-		
-			strcpy(tech_pvt->dest, "vmain");
-			skinny_process_dest(listener, line);
+		    skinny_create_ingoing_session(listener, &line_instance, &session);
+			skinny_session_process_dest(session, listener, line_instance, "vmain", '\0', 0);
 			break;
 		case SKINNY_BUTTON_SPEED_DIAL:
 			skinny_speed_dial_get(listener, request->data.stimulus.instance, &button);
 			if(strlen(button->line) > 0) {
-				skinny_create_session(listener, line, SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT);
-
-				tech_pvt = switch_core_session_get_private(listener->session[line]);
-				assert(tech_pvt != NULL);
-		
-				strcpy(tech_pvt->dest, button->line);
-				skinny_process_dest(listener, line);
+		        skinny_create_ingoing_session(listener, &line_instance, &session);
+			    skinny_session_process_dest(session, listener, line_instance, button->line, '\0', 0);
 			}
 			break;
 		default:
@@ -1774,35 +2012,21 @@ switch_status_t skinny_handle_stimulus_message(listener_t *listener, skinny_mess
 switch_status_t skinny_handle_open_receive_channel_ack_message(listener_t *listener, skinny_message_t *request)
 {
 	switch_status_t status = SWITCH_STATUS_SUCCESS;
-	skinny_profile_t *profile;
-	uint32_t line = 0;
-
-	switch_assert(listener->profile);
-	switch_assert(listener->device_name);
-
-	profile = listener->profile;
+	uint32_t line_instance = 0;
+	switch_core_session_t *session;
 
 	skinny_check_data_length(request, sizeof(request->data.open_receive_channel_ack));
 
-	for(int i = 0 ; i < SKINNY_MAX_BUTTON_COUNT ; i++) {
-		if(listener->session[i]) {
-			private_t *tech_pvt = NULL;
-			tech_pvt = switch_core_session_get_private(listener->session[i]);
-			
-			if(tech_pvt->party_id == request->data.open_receive_channel_ack.pass_thru_party_id) {
-				line = i;
-			}
-		}
-	}
+    session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.open_receive_channel_ack.pass_thru_party_id);
 
-	if(listener->session[line]) {
+	if(session) {
 		const char *err = NULL;
 		private_t *tech_pvt = NULL;
 		switch_channel_t *channel = NULL;
 		struct in_addr addr;
 
-		tech_pvt = switch_core_session_get_private(listener->session[line]);
-		channel = switch_core_session_get_channel(listener->session[line]);
+		tech_pvt = switch_core_session_get_private(session);
+		channel = switch_core_session_get_channel(session);
 
 		/* Codec */
 		tech_pvt->iananame = "PCMU"; /* TODO */
@@ -1810,7 +2034,7 @@ switch_status_t skinny_handle_open_receive_channel_ack_message(listener_t *liste
 		tech_pvt->rm_rate = 8000; /* TODO */
 		tech_pvt->rm_fmtp = NULL; /* TODO */
 		tech_pvt->agreed_pt = (switch_payload_t) 0; /* TODO */
-		tech_pvt->rm_encoding = switch_core_strdup(switch_core_session_get_pool(listener->session[line]), "");
+		tech_pvt->rm_encoding = switch_core_strdup(switch_core_session_get_pool(session), "");
 		skinny_tech_set_codec(tech_pvt, 0);
 		if ((status = skinny_tech_set_codec(tech_pvt, 0)) != SWITCH_STATUS_SUCCESS) {
 			goto end;
@@ -1821,7 +2045,7 @@ switch_status_t skinny_handle_open_receive_channel_ack_message(listener_t *liste
 			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(tech_pvt->session), SWITCH_LOG_CRIT, "No RTP ports available!\n");
 			return SWITCH_STATUS_FALSE;
 		}
-		tech_pvt->local_sdp_audio_ip = switch_core_strdup(switch_core_session_get_pool(listener->session[line]), listener->profile->ip);
+		tech_pvt->local_sdp_audio_ip = switch_core_strdup(switch_core_session_get_pool(session), listener->profile->ip);
 
 		tech_pvt->remote_sdp_audio_ip = inet_ntoa(request->data.open_receive_channel_ack.ip);
 		tech_pvt->remote_sdp_audio_port = request->data.open_receive_channel_ack.port;
@@ -1834,7 +2058,7 @@ switch_status_t skinny_handle_open_receive_channel_ack_message(listener_t *liste
 											   tech_pvt->read_impl.samples_per_packet,
 											   tech_pvt->codec_ms * 1000,
 											   (switch_rtp_flag_t) 0, "soft", &err,
-											   switch_core_session_get_pool(listener->session[line]));
+											   switch_core_session_get_pool(session));
 		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(tech_pvt->session), SWITCH_LOG_DEBUG,
 						  "AUDIO RTP [%s] %s:%d->%s:%d codec: %u ms: %d [%s]\n",
 						  switch_channel_get_name(channel),
@@ -1858,7 +2082,12 @@ switch_status_t skinny_handle_open_receive_channel_ack_message(listener_t *liste
 			0, /* uint16_t max_frames_per_packet, */
 			0 /* uint32_t g723_bitrate */
 		);
+	    if (switch_channel_get_state(channel) == CS_NEW) {
+		    switch_channel_set_state(channel, CS_INIT);
+	    }
 		switch_channel_mark_answered(channel);
+		
+		switch_core_session_rwunlock(session);
 	}
 end:
 	return status;
@@ -1866,35 +2095,28 @@ end:
 
 switch_status_t skinny_handle_keypad_button_message(listener_t *listener, skinny_message_t *request)
 {
-	uint32_t line = 0;
+	uint32_t line_instance = 0;
+	switch_core_session_t *session;
 
 	skinny_check_data_length(request, sizeof(request->data.keypad_button));
+    
+    if(request->data.keypad_button.line_instance) {
+        line_instance = request->data.keypad_button.line_instance;
+    } else {
+        line_instance = 1;
+    }
 
-	/* Choose the specified line */
-	line = request->data.keypad_button.line_instance;
-	if(line == 0) {/* If none, find the first busy line */
-		for(int i = 0 ; i < SKINNY_MAX_BUTTON_COUNT ; i++) {
-			if(listener->session[i]) {
-				line = i;
-				break;
-			}
-		}
-	}
-	if(line == 0) {/* If none, choose the first line */
-		line = 1;
-	}
-	if(listener->session[line]) {
+    session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.keypad_button.call_id);
+
+	if(session) {
 		switch_channel_t *channel = NULL;
 		private_t *tech_pvt = NULL;
 		char digit = '\0';
 
-		channel = switch_core_session_get_channel(listener->session[line]);
-		assert(channel != NULL);
-
-		tech_pvt = switch_core_session_get_private(listener->session[line]);
-		assert(tech_pvt != NULL);
+		channel = switch_core_session_get_channel(session);
+		tech_pvt = switch_core_session_get_private(session);
 		
-		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(listener->session[line]), SWITCH_LOG_DEBUG, "SEND DTMF ON CALL %d [%d]\n", tech_pvt->call_id, request->data.keypad_button.button);
+		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "SEND DTMF ON CALL %d [%d]\n", tech_pvt->call_id, request->data.keypad_button.button);
 
 		if (request->data.keypad_button.button == 14) {
 			digit = '*';
@@ -1903,21 +2125,14 @@ switch_status_t skinny_handle_keypad_button_message(listener_t *listener, skinny
 		} else if (request->data.keypad_button.button >= 0 && request->data.keypad_button.button <= 9) {
 			digit = '0' + request->data.keypad_button.button;
 		} else {
-			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(listener->session[line]), SWITCH_LOG_WARNING, "UNKNOW DTMF RECEIVED ON CALL %d [%d]\n", tech_pvt->call_id, request->data.keypad_button.button);
+			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "UNKNOW DTMF RECEIVED ON CALL %d [%d]\n", tech_pvt->call_id, request->data.keypad_button.button);
 		}
 
 		/* TODO check call_id and line */
 
-		if((skinny_line_get_state(listener, tech_pvt->line) == SKINNY_KEY_SET_OFF_HOOK)
-				|| (skinny_line_get_state(listener, tech_pvt->line) == SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT)) {
-			if(strlen(tech_pvt->dest) == 0) {/* first digit */
-				stop_tone(listener, tech_pvt->line, tech_pvt->call_id);
-				skinny_line_set_state(listener, tech_pvt->line, SKINNY_KEY_SET_DIGITS_AFTER_DIALING_FIRST_DIGIT, tech_pvt->call_id);
-			}
+		if((skinny_line_get_state(listener, line_instance, tech_pvt->call_id) == SKINNY_OFF_HOOK)) {
 			
-			tech_pvt->dest[strlen(tech_pvt->dest)] = digit;
-			
-			skinny_process_dest(listener, tech_pvt->line);
+		    skinny_session_process_dest(session, listener, line_instance, NULL, digit, 0);
 		} else {
 			if(digit != '\0') {
 				switch_dtmf_t dtmf = { 0, switch_core_default_dtmf_duration(0)};
@@ -1925,6 +2140,7 @@ switch_status_t skinny_handle_keypad_button_message(listener_t *listener, skinny
 				switch_channel_queue_dtmf(channel, &dtmf);
 			}
 		}
+    	switch_core_session_rwunlock(session);
 	}
 
 	return SWITCH_STATUS_SUCCESS;
@@ -1933,35 +2149,23 @@ switch_status_t skinny_handle_keypad_button_message(listener_t *listener, skinny
 switch_status_t skinny_handle_on_hook_message(listener_t *listener, skinny_message_t *request)
 {
 	switch_status_t status = SWITCH_STATUS_SUCCESS;
-	skinny_profile_t *profile;
-	uint32_t line = 0;
-
-	switch_assert(listener->profile);
-	switch_assert(listener->device_name);
-
-	profile = listener->profile;
+	switch_core_session_t *session = NULL;
+	uint32_t line_instance = 0;
 
 	skinny_check_data_length(request, sizeof(request->data.on_hook));
 
-	if(request->data.on_hook.line_instance != 0) {
-		line = request->data.on_hook.line_instance;
-	} else {
-		/* Find first active line */
-		for(int i = 0 ; i < SKINNY_MAX_BUTTON_COUNT ; i++) {
-			if(listener->session[i]) {
-				line = i;
-				break;
-			}
-		}
-	}
+    line_instance = request->data.on_hook.line_instance;
+    
+    session = skinny_profile_find_session(listener->profile, listener, &line_instance, request->data.on_hook.call_id);
 
-	if(listener->session[line]) {
+	if(session) {
 		switch_channel_t *channel = NULL;
 
-		channel = switch_core_session_get_channel(listener->session[line]);
-		assert(channel != NULL);
+		channel = switch_core_session_get_channel(session);
 
 		switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
+		
+		switch_core_session_rwunlock(session);
 	}
 	return status;
 }
diff --git a/src/mod/endpoints/mod_skinny/skinny_protocol.h b/src/mod/endpoints/mod_skinny/skinny_protocol.h
index c0af0b771e..abdcfb7e9c 100644
--- a/src/mod/endpoints/mod_skinny/skinny_protocol.h
+++ b/src/mod/endpoints/mod_skinny/skinny_protocol.h
@@ -59,6 +59,9 @@ struct register_message {
 
 /* PortMessage */
 #define PORT_MESSAGE 0x0002
+struct port_message {
+	uint16_t port;
+};
 
 /* KeypadButtonMessage */
 #define KEYPAD_BUTTON_MESSAGE 0x0003
@@ -73,14 +76,14 @@ struct keypad_button_message {
 struct stimulus_message {
 	uint32_t instance_type; /* See enum skinny_button_definition */
 	uint32_t instance;
-	/* uint32_t call_reference; */
+	uint32_t call_id;
 };
 
 /* OffHookMessage */
 #define OFF_HOOK_MESSAGE 0x0006
 struct off_hook_message {
 	uint32_t line_instance;
-	/* uint32_t call_id; */
+	uint32_t call_id;
 };
 
 /* OnHookMessage */
@@ -150,7 +153,7 @@ struct open_receive_channel_ack_message {
 struct soft_key_event_message {
 	uint32_t event;
 	uint32_t line_instance;
-	uint32_t callreference;
+	uint32_t call_id;
 };
 
 /* UnregisterMessage */
@@ -186,10 +189,10 @@ struct register_available_lines_message {
 /* RegisterAckMessage */
 #define REGISTER_ACK_MESSAGE 0x0081
 struct register_ack_message {
-	uint32_t keepAlive;
-	char dateFormat[6];
+	uint32_t keep_alive;
+	char date_format[6];
 	char reserved[2];
-	uint32_t secondaryKeepAlive;
+	uint32_t secondary_keep_alive;
 	char reserved2[4];
 };
 
@@ -214,7 +217,8 @@ struct stop_tone_message {
 struct set_ringer_message {
 	uint32_t ring_type; /* See enum skinny_ring_type */
 	uint32_t ring_mode; /* See enum skinny_ring_mode */
-	uint32_t unknown; /* ?? */
+	uint32_t line_instance;
+	uint32_t call_id;
 };
 
 /* SetLampMessage */
@@ -470,6 +474,14 @@ struct feature_stat_res_message {
 	uint32_t status;
 };
 
+/* DisplayPriNotifyMessage */
+#define DISPLAY_PRI_NOTIFY_MESSAGE 0x0120
+struct display_pri_notify_message {
+	uint32_t message_timeout;
+	uint32_t priority;
+	char notify[32];
+};
+
 /* ServiceUrlStatMessage */
 #define SERVICE_URL_STAT_RES_MESSAGE 0x012F
 struct service_url_stat_res_message {
@@ -487,6 +499,7 @@ struct service_url_stat_res_message {
 
 union skinny_data {
 	struct register_message reg;
+	struct port_message port;
 	struct keypad_button_message keypad_button;
 	struct stimulus_message stimulus;
 	struct off_hook_message off_hook;
@@ -529,6 +542,7 @@ union skinny_data {
 	struct unregister_ack_message unregister_ack;
 	struct dialed_number_message dialed_number;
 	struct feature_stat_res_message feature_res;
+	struct display_pri_notify_message display_pri_notify;
 	struct service_url_stat_res_message service_url_res;
 	
 	uint16_t as_uint16;
@@ -598,16 +612,24 @@ typedef switch_status_t (*skinny_command_t) (char **argv, int argc, switch_strea
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Received Too Short Skinny Message (Expected %" SWITCH_SIZE_T_FMT ", got %d).\n", len+4, message->length);\
 		return SWITCH_STATUS_FALSE;\
 	}
+#define skinny_check_data_length_soft(message, len) \
+    (message->length >= len+4)
 
 switch_status_t skinny_read_packet(listener_t *listener, skinny_message_t **req);
 
 switch_status_t skinny_device_event(listener_t *listener, switch_event_t **ev, switch_event_types_t event_id, const char *subclass_name);
 
-switch_status_t skinny_send_call_info(switch_core_session_t *session);
+switch_status_t skinny_send_call_info(switch_core_session_t *session, listener_t *listener, uint32_t line_instance);
+switch_status_t skinny_session_walk_lines(skinny_profile_t *profile, char *channel_uuid, switch_core_db_callback_func_t callback, void *data);
+switch_call_cause_t skinny_ring_lines(private_t *tech_pvt);
 
-switch_status_t skinny_create_session(listener_t *listener, uint32_t line, uint32_t to_state);
-switch_status_t skinny_process_dest(listener_t *listener, uint32_t line);
-switch_status_t skinny_answer(switch_core_session_t *session);
+switch_status_t skinny_create_ingoing_session(listener_t *listener, uint32_t *line_instance, switch_core_session_t **session);
+switch_status_t skinny_session_process_dest(switch_core_session_t *session, listener_t *listener, uint32_t line_instance, char *dest, char append_dest, uint32_t backspace);
+switch_status_t skinny_session_ring_out(switch_core_session_t *session, listener_t *listener, uint32_t line_instance);
+switch_status_t skinny_session_answer(switch_core_session_t *session, listener_t *listener, uint32_t line_instance);
+switch_status_t skinny_session_start_media(switch_core_session_t *session, listener_t *listener, uint32_t line_instance);
+switch_status_t skinny_session_hold_line(switch_core_session_t *session, listener_t *listener, uint32_t line_instance);
+switch_status_t skinny_session_unhold_line(switch_core_session_t *session, listener_t *listener, uint32_t line_instance);
 
 void skinny_line_get(listener_t *listener, uint32_t instance, struct line_stat_res_message **button);
 void skinny_speed_dial_get(listener_t *listener, uint32_t instance, struct speed_dial_stat_res_message **button);
@@ -631,7 +653,8 @@ switch_status_t stop_tone(listener_t *listener,
 switch_status_t set_ringer(listener_t *listener,
 	uint32_t ring_type,
 	uint32_t ring_mode,
-	uint32_t unknown);
+	uint32_t line_instance,
+	uint32_t call_id);
 switch_status_t set_lamp(listener_t *listener,
 	uint32_t stimulus,
 	uint32_t stimulus_instance,
@@ -710,6 +733,10 @@ switch_status_t send_dialed_number(listener_t *listener,
 	char called_party[24],
 	uint32_t line_instance,
 	uint32_t call_id);
+switch_status_t send_display_pri_notify(listener_t *listener,
+	uint32_t message_timeout,
+	uint32_t priority,
+	char *notify);
 switch_status_t send_reset(listener_t *listener,
 	uint32_t reset_type);
 
diff --git a/src/mod/endpoints/mod_skinny/skinny_tables.c b/src/mod/endpoints/mod_skinny/skinny_tables.c
index 667ae3cd63..6213af38a2 100644
--- a/src/mod/endpoints/mod_skinny/skinny_tables.c
+++ b/src/mod/endpoints/mod_skinny/skinny_tables.c
@@ -77,7 +77,7 @@ struct skinny_table SKINNY_MESSAGE_TYPES[] = {
 	{"ResetMessage", RESET_MESSAGE},
 	{"KeepAliveAckMessage", KEEP_ALIVE_ACK_MESSAGE},
 	{"OpenReceiveChannelMessage", OPEN_RECEIVE_CHANNEL_MESSAGE},
-	{"OCloseReceiveChannelMessage", CLOSE_RECEIVE_CHANNEL_MESSAGE},
+	{"CloseReceiveChannelMessage", CLOSE_RECEIVE_CHANNEL_MESSAGE},
 	{"SoftKeyTemplateResMessage", SOFT_KEY_TEMPLATE_RES_MESSAGE},
 	{"SoftKeySetResMessage", SOFT_KEY_SET_RES_MESSAGE},
 	{"SelectSoftKeysMessage", SELECT_SOFT_KEYS_MESSAGE},
@@ -88,6 +88,7 @@ struct skinny_table SKINNY_MESSAGE_TYPES[] = {
 	{"UnregisterAckMessage", UNREGISTER_ACK_MESSAGE},
 	{"DialedNumberMessage", DIALED_NUMBER_MESSAGE},
 	{"FeatureResMessage", FEATURE_STAT_RES_MESSAGE},
+	{"DisplayPriNotifyMessage", DISPLAY_PRI_NOTIFY_MESSAGE},
 	{"ServiceUrlStatMessage", SERVICE_URL_STAT_RES_MESSAGE},
 	{NULL, 0}
 };
@@ -168,13 +169,13 @@ struct skinny_table SKINNY_CALL_STATES[] = {
 	{"RingIn", SKINNY_RING_IN},
 	{"Connected", SKINNY_CONNECTED},
 	{"Busy", SKINNY_BUSY},
-	{"Congestion", SKINNY_CONGESTION},
+	{"LineInUse", SKINNY_LINE_IN_USE},
 	{"Hold", SKINNY_HOLD},
 	{"CallWaiting", SKINNY_CALL_WAITING},
 	{"CallTransfer", SKINNY_CALL_TRANSFER},
 	{"CallPark", SKINNY_CALL_PARK},
 	{"Proceed", SKINNY_PROCEED},
-	{"CallRemoteMultiline", SKINNY_CALL_REMOTE_MULTILINE},
+	{"InUseRemotely", SKINNY_IN_USE_REMOTELY},
 	{"InvalidNumber", SKINNY_INVALID_NUMBER},
 	{NULL, 0}
 };
diff --git a/src/mod/endpoints/mod_skinny/skinny_tables.h b/src/mod/endpoints/mod_skinny/skinny_tables.h
index 5672446bc0..a0062a62db 100644
--- a/src/mod/endpoints/mod_skinny/skinny_tables.h
+++ b/src/mod/endpoints/mod_skinny/skinny_tables.h
@@ -84,7 +84,7 @@ uint32_t func(const char *str)\
 	}
 	
 
-struct skinny_table SKINNY_MESSAGE_TYPES[55];
+struct skinny_table SKINNY_MESSAGE_TYPES[56];
 const char *skinny_message_type2str(uint32_t id);
 uint32_t skinny_str2message_type(const char *str);
 #define SKINNY_PUSH_MESSAGE_TYPES SKINNY_DECLARE_PUSH_MATCH(SKINNY_MESSAGE_TYPES)
@@ -210,13 +210,13 @@ enum skinny_call_state {
 	SKINNY_RING_IN = 4,
 	SKINNY_CONNECTED = 5,
 	SKINNY_BUSY = 6,
-	SKINNY_CONGESTION = 7,
+	SKINNY_LINE_IN_USE = 7,
 	SKINNY_HOLD = 8,
 	SKINNY_CALL_WAITING = 9,
 	SKINNY_CALL_TRANSFER = 10,
 	SKINNY_CALL_PARK = 11,
 	SKINNY_PROCEED = 12,
-	SKINNY_CALL_REMOTE_MULTILINE = 13,
+	SKINNY_IN_USE_REMOTELY = 13,
 	SKINNY_INVALID_NUMBER = 14
 };
 struct skinny_table SKINNY_CALL_STATES[15];