diff --git a/libs/freetdm/mod_openzap/Makefile b/libs/freetdm/mod_openzap/Makefile
index 2ff7f24232..7edd420cdf 100644
--- a/libs/freetdm/mod_openzap/Makefile
+++ b/libs/freetdm/mod_openzap/Makefile
@@ -9,6 +9,6 @@ include $(BASE)/build/modmake.rules
 local_depend: $(OZA)
 
 $(OZA): 
-	cd $(OZ_DIR) && $(MAKE) ZAP_MODS=wanpipe
+	cd $(OZ_DIR) && $(MAKE) ZAP_MODS="wanpipe zt" ZAP_CFLAGS="-g -ggdb"
 
 
diff --git a/libs/freetdm/src/hashtable.c b/libs/freetdm/src/hashtable.c
index c903d3ca67..fff5e99347 100644
--- a/libs/freetdm/src/hashtable.c
+++ b/libs/freetdm/src/hashtable.c
@@ -213,29 +213,19 @@ hashtable_remove(struct hashtable *h, void *k)
 /*****************************************************************************/
 /* destroy */
 void
-hashtable_destroy(struct hashtable *h, int free_values)
+hashtable_destroy(struct hashtable *h, int free_keys, int free_values)
 {
     unsigned int i;
     struct entry *e, *f;
     struct entry **table = h->table;
-    if (free_values)
-    {
-        for (i = 0; i < h->tablelength; i++)
+
+	for (i = 0; i < h->tablelength; i++)
         {
             e = table[i];
             while (NULL != e)
-            { f = e; e = e->next; freekey(f->k); free(f->v); free(f); }
+				{ f = e; e = e->next; if (free_keys) freekey(f->k); if (free_values) free(f->v); free(f); }
         }
-    }
-    else
-    {
-        for (i = 0; i < h->tablelength; i++)
-        {
-            e = table[i];
-            while (NULL != e)
-            { f = e; e = e->next; freekey(f->k); free(f); }
-        }
-    }
+    
     free(h->table);
     free(h);
 }
diff --git a/libs/freetdm/src/include/hashtable.h b/libs/freetdm/src/include/hashtable.h
index e6d23ff52f..4019a69ff9 100644
--- a/libs/freetdm/src/include/hashtable.h
+++ b/libs/freetdm/src/include/hashtable.h
@@ -166,7 +166,7 @@ hashtable_count(struct hashtable *h);
  */
 
 void
-hashtable_destroy(struct hashtable *h, int free_values);
+hashtable_destroy(struct hashtable *h, int free_keys, int free_values);
 
 #endif /* __HASHTABLE_CWC22_H__ */
 
diff --git a/libs/freetdm/src/include/zap_types.h b/libs/freetdm/src/include/zap_types.h
index d1fcb9248d..2c97f40aed 100644
--- a/libs/freetdm/src/include/zap_types.h
+++ b/libs/freetdm/src/include/zap_types.h
@@ -46,6 +46,7 @@ typedef int zap_socket_t;
 #endif
 
 typedef size_t zap_size_t;
+typedef ssize_t zap_ssize_t;
 struct zap_io_interface;
 
 #define ZAP_COMMAND_OBJ_INT *((int *)obj)
diff --git a/libs/freetdm/src/include/zap_zt.h b/libs/freetdm/src/include/zap_zt.h
index bc070302d1..47b5470b7f 100644
--- a/libs/freetdm/src/include/zap_zt.h
+++ b/libs/freetdm/src/include/zap_zt.h
@@ -34,6 +34,8 @@
 #ifndef ZAP_ZT_H
 #define ZAP_ZT_H
 #include "openzap.h"
+#include <sys/ioctl.h>
+#include <poll.h>
 
 /* Hardware interface structures and defines */
 /* Based on documentation of the structures required for the hardware interface */
@@ -69,6 +71,8 @@ struct zt_params {
 	int pulse_after_time;
 };
 
+typedef struct zt_params zt_params_t;
+
 /* Used with ioctl: ZT_CONFLINK, ZT_GETCONF and ZT_SETCONF */
 struct zt_confinfo {
 	int chan_no;			/* Channel Number, 0 for current */
@@ -164,13 +168,13 @@ typedef enum {
 	ZT_RINGOFF				= 6
 } zt_hookstate_t;
 
-typedef enum {
-	ZT_MAINT_NONE			= 0, /* Normal Mode				*/
-	ZT_MAINT_LOCALLOOP		= 1, /* Local Loopback			*/
-	ZT_MAINT_REMOTELOOP		= 2, /* Remote Loopback			*/
-	ZT_MAINT_LOOPUP			= 3, /* Send Loopup Code		*/
-	ZT_MAINT_LOOPDOWN		= 4, /* Send Loopdown Code		*/
-	ZT_MAINT_LOOPSTOP		= 5, /* Stop Sending Loop Codes	*/
+typedef enum {
+	ZT_MAINT_NONE			= 0, /* Normal Mode				*/
+	ZT_MAINT_LOCALLOOP		= 1, /* Local Loopback			*/
+	ZT_MAINT_REMOTELOOP		= 2, /* Remote Loopback			*/
+	ZT_MAINT_LOOPUP			= 3, /* Send Loopup Code		*/
+	ZT_MAINT_LOOPDOWN		= 4, /* Send Loopdown Code		*/
+	ZT_MAINT_LOOPSTOP		= 5  /* Stop Sending Loop Codes	*/
 } zt_maintenance_mode_t;
 
 
diff --git a/libs/freetdm/src/testanalog.c b/libs/freetdm/src/testanalog.c
index 82e9e8df89..c42f40fc46 100644
--- a/libs/freetdm/src/testanalog.c
+++ b/libs/freetdm/src/testanalog.c
@@ -71,11 +71,15 @@ int main(int argc, char *argv[])
 
 	zap_log(ZAP_LOG_DEBUG, "OpenZAP loaded\n");
 
-	if (zap_span_find("wanpipe", 1, &span) != ZAP_SUCCESS) {
+	if (zap_span_find("zt", 1, &span) != ZAP_SUCCESS) {
 		zap_log(ZAP_LOG_ERROR, "Error finding OpenZAP span\n");
+		exit(-1);
 	}
 	
-	zap_analog_configure_span(span, "us", 2000, 11, on_signal);
+	if (zap_analog_configure_span(span, "us", 2000, 11, on_signal) != ZAP_SUCCESS) {
+		zap_log(ZAP_LOG_ERROR, "Error configuring OpenZAP span\n");
+		exit(-1);
+	}
 	zap_analog_start(span);
 
 	while(zap_test_flag(span->analog_data, ZAP_ANALOG_RUNNING)) {
diff --git a/libs/freetdm/src/testapp.c b/libs/freetdm/src/testapp.c
index 75ddae66e5..d980a034df 100644
--- a/libs/freetdm/src/testapp.c
+++ b/libs/freetdm/src/testapp.c
@@ -17,7 +17,7 @@ int main(int argc, char *argv[])
 
  top:
 	//if (zap_channel_open_any("wanpipe", 0, ZAP_TOP_DOWN, &chan) == ZAP_SUCCESS) {
-	if (zap_channel_open("wanpipe", 1, 1, &chan) == ZAP_SUCCESS) {
+	if (zap_channel_open("zt", 1, 1, &chan) == ZAP_SUCCESS) {
 		int x = 0;
 		printf("opened channel %d:%d\n", chan->span_id, chan->chan_id);
 
@@ -42,7 +42,7 @@ int main(int argc, char *argv[])
 			unsigned char buf[2048];
 			zap_size_t len = sizeof(buf);
 			zap_wait_flag_t flags = ZAP_READ;
-			
+
 			if (zap_channel_wait(chan, &flags, -1) == ZAP_FAIL) {
 				printf("wait FAIL! %d [%s]\n", len, chan->last_error);
 			}
diff --git a/libs/freetdm/src/zap_analog.c b/libs/freetdm/src/zap_analog.c
index b6314dc339..eb5c381d7d 100644
--- a/libs/freetdm/src/zap_analog.c
+++ b/libs/freetdm/src/zap_analog.c
@@ -253,6 +253,7 @@ static void *zap_analog_channel_run(zap_thread_t *me, void *obj)
 			}
 		}
 
+		
 		if (last_digit && ((elapsed - last_digit > data->digit_timeout) || strlen(dtmf) > data->max_dialstr)) {
 			zap_log(ZAP_LOG_DEBUG, "Number obtained [%s]\n", dtmf);
 			zap_set_state_locked(chan, ZAP_CHANNEL_STATE_IDLE);
diff --git a/libs/freetdm/src/zap_io.c b/libs/freetdm/src/zap_io.c
index 845cba7ef9..7890ceaaa2 100644
--- a/libs/freetdm/src/zap_io.c
+++ b/libs/freetdm/src/zap_io.c
@@ -229,9 +229,11 @@ zap_status_t zap_span_close_all(zap_io_interface_t *zio)
 		span = &zio->spans[i];
 
 		for(j = 0; j < span->chan_count; j++) {
-			zap_mutex_destroy(&span->channels[j].mutex);
-			zap_buffer_destroy(&span->channels[j].digit_buffer);
-			zap_buffer_destroy(&span->channels[j].dtmf_buffer);
+			if (zap_test_flag((&span->channels[j]), ZAP_CHANNEL_CONFIGURED)) {
+				zap_mutex_destroy(&span->channels[j].mutex);
+				zap_buffer_destroy(&span->channels[j].digit_buffer);
+				zap_buffer_destroy(&span->channels[j].dtmf_buffer);
+			}
 		}
 
 		if (span->mutex) {
@@ -1417,7 +1419,8 @@ zap_status_t zap_global_init(void)
 	modcount = 0;
 	zap_mutex_create(&globals.mutex);
 	
-#ifdef ZAP_WANPIPE_SUPPORT
+#ifdef Z
+AP_WANPIPE_SUPPORT
 	if (wanpipe_init(&interfaces.wanpipe_interface) == ZAP_SUCCESS) {
 		zap_mutex_lock(globals.mutex);
 		hashtable_insert(globals.interface_hash, (void *)interfaces.wanpipe_interface->name, interfaces.wanpipe_interface);
@@ -1483,18 +1486,20 @@ zap_status_t zap_global_destroy(void)
 
 #ifdef ZAP_ZT_SUPPORT
 	if (interfaces.zt_interface) {
-		zt_destroy();
 		zap_span_close_all(interfaces.zt_interface);
+		zt_destroy();		
 	}
 #endif
 #ifdef ZAP_WANPIPE_SUPPORT
 	if (interfaces.wanpipe_interface) {
-		wanpipe_destroy();
 		zap_span_close_all(interfaces.wanpipe_interface);
+		wanpipe_destroy();
 	}
 #endif
 
-	hashtable_destroy(globals.interface_hash, 0);
+	zap_mutex_lock(globals.mutex);
+	hashtable_destroy(globals.interface_hash, 0, 0);
+	zap_mutex_unlock(globals.mutex);
 	zap_mutex_destroy(&globals.mutex);
 	return ZAP_SUCCESS;
 }
diff --git a/libs/freetdm/src/zap_zt.c b/libs/freetdm/src/zap_zt.c
index 57d006e8d3..c91c585c70 100644
--- a/libs/freetdm/src/zap_zt.c
+++ b/libs/freetdm/src/zap_zt.c
@@ -35,45 +35,393 @@
 #include "openzap.h"
 #include "zap_zt.h"
 
+
+static struct {
+	uint32_t codec_ms;
+	uint32_t wink_ms;
+	uint32_t flash_ms;
+} zt_globals;
+
+#define ZT_INVALID_SOCKET -1
+
+static unsigned zt_open_range(zap_span_t *span, unsigned start, unsigned end, zap_chan_type_t type, char *name, char *number)
+{
+	unsigned configured = 0, x;
+	char path[128] = "";
+	zt_params_t ztp = {0};
+
+	for(x = start; x < end; x++) {
+		zap_channel_t *chan;
+		zap_socket_t sockfd = ZT_INVALID_SOCKET;
+		int command;
+		int len = zt_globals.codec_ms * 8;
+
+		snprintf(path, sizeof(path), "/dev/zap/%d", x);
+		sockfd = open(path, O_RDWR);
+		
+		if (sockfd != ZT_INVALID_SOCKET && zap_span_add_channel(span, sockfd, type, &chan) == ZAP_SUCCESS) {
+			command = ZT_START;
+#if 0
+
+			if (ioctl(sockfd, ZT_HOOK, &command)) {
+				zap_log(ZAP_LOG_INFO, "failure configuring device %s as OpenZAP device %d:%d fd:%d err:%s\n", 
+						path, chan->span_id, chan->chan_id, sockfd, strerror(errno));
+
+				continue;
+			}
+#endif
+	
+			if (ioctl(chan->sockfd, ZT_SET_BLOCKSIZE, &len)) {
+				zap_log(ZAP_LOG_INFO, "failure configuring device %s as OpenZAP device %d:%d fd:%d err:%s\n", 
+						path, chan->span_id, chan->chan_id, sockfd, strerror(errno));
+				close(sockfd);
+				continue;
+			} else {
+                chan->packet_len = len;
+                chan->effective_interval = chan->native_interval = chan->packet_len / 8;
+				
+                if (chan->effective_codec == ZAP_CODEC_SLIN) {
+                    chan->packet_len *= 2;
+                }
+			}
+			
+			
+			if (ioctl(sockfd, ZT_GET_PARAMS, &ztp) < 0) {
+				close(sockfd);
+				zap_log(ZAP_LOG_INFO, "failure configuring device %s as OpenZAP device %d:%d fd:%d\n", path, chan->span_id, chan->chan_id, sockfd);
+				continue;
+			}
+			zap_log(ZAP_LOG_INFO, "configuring device %s as OpenZAP device %d:%d fd:%d\n", path, chan->span_id, chan->chan_id, sockfd);
+
+			if (type == ZAP_CHAN_TYPE_FXS || type == ZAP_CHAN_TYPE_FXO) {
+				if (ztp.g711_type == ZT_G711_ALAW) {
+					chan->native_codec = chan->effective_codec = ZAP_CODEC_ALAW;
+				} else {
+					chan->native_codec = chan->effective_codec = ZAP_CODEC_ULAW;
+				}
+			}
+
+			if (!zap_strlen_zero(name)) {
+				zap_copy_string(chan->chan_name, name, sizeof(chan->chan_name));
+			}
+			if (!zap_strlen_zero(number)) {
+				zap_copy_string(chan->chan_number, number, sizeof(chan->chan_number));
+			}
+			configured++;
+		} else {
+			zap_log(ZAP_LOG_ERROR, "failure configuring device %s\n", path);
+		}
+	}
+	
+	return configured;
+}
+
 static ZIO_CONFIGURE_SPAN_FUNCTION(zt_configure_span)
 {
-	return ZAP_FAIL;
+
+	int items, i;
+    char *mydata, *item_list[10];
+	char *ch, *mx;
+	int channo;
+	int top = 0;
+	unsigned configured = 0;
+
+	assert(str != NULL);
+	
+
+	mydata = strdup(str);
+	assert(mydata != NULL);
+
+
+	items = zap_separate_string(mydata, ',', item_list, (sizeof(item_list) / sizeof(item_list[0])));
+
+	for(i = 0; i < items; i++) {
+		ch = item_list[i];
+
+		if (!(ch)) {
+			zap_log(ZAP_LOG_ERROR, "Invalid input\n");
+			continue;
+		}
+
+		channo = atoi(ch);
+		
+		if (channo < 0) {
+			zap_log(ZAP_LOG_ERROR, "Invalid channel number %d\n", channo);
+			continue;
+		}
+
+		if ((mx = strchr(ch, '-'))) {
+			mx++;
+			top = atoi(mx) + 1;
+		} else {
+			top = channo + 1;
+		}
+		
+		
+		if (top < 0) {
+			zap_log(ZAP_LOG_ERROR, "Invalid range number %d\n", top);
+			continue;
+		}
+
+		configured += zt_open_range(span, channo, top, type, name, number);
+
+	}
+	
+	free(mydata);
+
+	return configured;
+
 }
 
 static ZIO_CONFIGURE_FUNCTION(zt_configure)
 {
-	return ZAP_FAIL;
+	if (!strcasecmp(category, "defaults")) {
+		if (!strcasecmp(var, "codec_ms")) {
+			unsigned codec_ms = atoi(val);
+			if (codec_ms < 10 || codec_ms > 60) {
+				zap_log(ZAP_LOG_WARNING, "invalid codec ms at line %d\n", lineno);
+			} else {
+				zt_globals.codec_ms = codec_ms;
+			}
+		}
+	}
+	
+	return ZAP_SUCCESS;
 }
 
 static ZIO_OPEN_FUNCTION(zt_open) 
 {
 	ZIO_OPEN_MUZZLE;
-	return ZAP_FAIL;
+	return ZAP_SUCCESS;
 }
 
 static ZIO_CLOSE_FUNCTION(zt_close)
 {
 	ZIO_CLOSE_MUZZLE;
-	return ZAP_FAIL;
+	return ZAP_SUCCESS;
 }
 
 static ZIO_COMMAND_FUNCTION(zt_command)
 {
-	return ZAP_FAIL;
+	zt_params_t ztp = {0};
+	int err = 0;
+
+	ZIO_COMMAND_MUZZLE;
+	
+	switch(command) {
+	case ZAP_COMMAND_GET_INTERVAL:
+		{
+			if (!(err = ioctl(zchan->sockfd, ZT_GET_BLOCKSIZE, &zchan->packet_len))) {
+				zchan->native_interval = zchan->packet_len / 8;
+				if (zchan->effective_codec == ZAP_CODEC_SLIN) {
+					zchan->packet_len *= 2;
+				}
+				ZAP_COMMAND_OBJ_INT = zchan->native_interval;
+			}
+
+		}
+		break;
+	case ZAP_COMMAND_SET_INTERVAL: 
+		{
+			int interval = ZAP_COMMAND_OBJ_INT;
+			int len = interval * 8;
+
+			if (!(err = ioctl(zchan->sockfd, ZT_SET_BLOCKSIZE, &len))) {
+				zchan->packet_len = len;
+				zchan->effective_interval = zchan->native_interval = zchan->packet_len / 8;
+
+                if (zchan->effective_codec == ZAP_CODEC_SLIN) {
+                    zchan->packet_len *= 2;
+                }
+
+			}
+		}
+		break;
+	default:
+		break;
+	};
+
+	if (err) {
+		snprintf(zchan->last_error, sizeof(zchan->last_error), "%s", strerror(errno));
+		return ZAP_FAIL;
+	}
+
+
+	return ZAP_SUCCESS;
 }
 
 static ZIO_WAIT_FUNCTION(zt_wait)
 {
-	return ZAP_FAIL;
+	int32_t inflags = 0;
+	int result;
+    struct pollfd pfds[1];
+
+	if (*flags & ZAP_READ) {
+		inflags |= POLLIN;
+	}
+
+	if (*flags & ZAP_WRITE) {
+		inflags |= POLLOUT;
+	}
+
+	if (*flags & ZAP_EVENTS) {
+		inflags |= POLLPRI;
+	}
+
+
+    memset(&pfds[0], 0, sizeof(pfds[0]));
+    pfds[0].fd = zchan->sockfd;
+    pfds[0].events = inflags;
+    result = poll(pfds, 1, to);
+	*flags = 0;
+
+	if (pfds[0].revents & POLLERR) {
+		result = -1;
+	}
+
+	if (result > 0) {
+		*flags = pfds[0].revents;
+	}
+
+
+	*flags = ZAP_NO_FLAGS;
+
+	if (result < 0){
+		snprintf(zchan->last_error, sizeof(zchan->last_error), "Poll failed");
+		return ZAP_FAIL;
+	}
+
+	if (result == 0) {
+		return ZAP_TIMEOUT;
+	}
+
+	if (inflags & POLLIN) {
+		*flags |= ZAP_READ;
+	}
+
+	if (inflags & POLLOUT) {
+		*flags |= ZAP_WRITE;
+	}
+
+	if (inflags & POLLPRI) {
+		*flags |= ZAP_EVENTS;
+	}
+
+	return ZAP_SUCCESS;
+
 }
 
+ZIO_SPAN_POLL_EVENT_FUNCTION(zt_poll_event)
+{
+	struct pollfd pfds[ZAP_MAX_CHANNELS_SPAN];
+	int i, j = 0, k = 0, r, e;
+	
+	for(i = 1; i <= span->chan_count; i++) {
+		e = ZT_IOMUX_SIGEVENT;
+		memset(&pfds[j], 0, sizeof(pfds[j]));
+		pfds[j].fd = span->channels[i].sockfd;
+		pfds[j].events = POLLPRI;
+		ioctl(span->channels[i].sockfd ,ZT_IOMUX, &e);
+		j++;
+	}
+
+    r = poll(pfds, j, ms);
+
+	if (r == 0) {
+		return ZAP_TIMEOUT;
+	} else if (r < 0 || (pfds[i-1].revents & POLLERR)) {
+		snprintf(span->last_error, sizeof(span->last_error), "%s", strerror(errno));
+		return ZAP_FAIL;
+	}
+	
+	for(i = 1; i <= span->chan_count; i++) {
+		if (pfds[i-1].revents & POLLPRI) {
+			zap_set_flag((&span->channels[i]), ZAP_CHANNEL_EVENT);
+			span->channels[i].last_event_time = zap_current_time_in_ms();
+			k++;
+		}
+	}
+
+	return k ? ZAP_SUCCESS : ZAP_FAIL;
+}
+
+ZIO_SPAN_NEXT_EVENT_FUNCTION(zt_next_event)
+{
+	uint32_t i, event_id;
+	zap_oob_event_t zt_event_id;
+
+	for(i = 1; i <= span->chan_count; i++) {
+		if (zap_test_flag((&span->channels[i]), ZAP_CHANNEL_EVENT)) {
+			zap_clear_flag((&span->channels[i]), ZAP_CHANNEL_EVENT);
+			if (ioctl(span->channels[i].sockfd, ZT_GETEVENT, &zt_event_id) == -1) {
+				snprintf(span->last_error, sizeof(span->last_error), "%s", strerror(errno));
+				return ZAP_FAIL;
+			}
+
+			switch(zt_event_id) {
+			case ZT_EVENT_ONHOOK:
+				{
+					event_id = ZAP_OOB_ONHOOK;
+				}
+				break;
+			case ZT_EVENT_RINGOFFHOOK:
+				{
+					if (span->channels[i].type == ZAP_CHAN_TYPE_FXS) {
+						event_id = ZAP_OOB_OFFHOOK;
+					} else if (span->channels[i].type == ZAP_CHAN_TYPE_FXO) {
+						event_id = ZAP_OOB_RING_START;
+					}
+				}
+				break;
+			default:
+				{
+					zap_log(ZAP_LOG_WARNING, "Unhandled event %d\n", zt_event_id);
+					event_id = ZAP_OOB_INVALID;
+				}
+				break;
+			}
+
+		event:
+			span->channels[i].last_event_time = 0;
+			span->event_header.e_type = ZAP_EVENT_OOB;
+			span->event_header.enum_id = event_id;
+			span->event_header.channel = &span->channels[i];
+			*event = &span->event_header;
+			return ZAP_SUCCESS;
+		}
+	}
+
+	return ZAP_FAIL;
+	
+}
+
+
 static ZIO_READ_FUNCTION(zt_read)
 {
+	zap_ssize_t r = 0;
+
+	*datalen = zchan->packet_len;
+	r = read(zchan->sockfd, data, *datalen);
+	
+	if (r >= 0) {
+		*datalen = r;
+		return ZAP_SUCCESS;
+	}
+
 	return ZAP_FAIL;
 }
 
 static ZIO_WRITE_FUNCTION(zt_write)
 {
+	zap_ssize_t w = 0;
+
+	w = write(zchan->sockfd, data, *datalen);
+
+	if (w >= 0) {
+		*datalen = w;
+		return ZAP_SUCCESS;
+	}
+
 	return ZAP_FAIL;
 }
 
@@ -83,17 +431,26 @@ zap_status_t zt_init(zap_io_interface_t **zio)
 {
 	assert(zio != NULL);
 	memset(&zt_interface, 0, sizeof(zt_interface));
+	memset(&zt_globals, 0, sizeof(zt_globals));
+
+	zt_globals.codec_ms = 20;
+	zt_globals.wink_ms = 150;
+	zt_globals.flash_ms = 750;
 
 	zt_interface.name = "zt";
-	zt_interface.configure =  zt_configure;
+	zt_interface.configure = zt_configure;
+	zt_interface.configure_span = zt_configure_span;
 	zt_interface.open = zt_open;
 	zt_interface.close = zt_close;
 	zt_interface.wait = zt_wait;
 	zt_interface.read = zt_read;
 	zt_interface.write = zt_write;
+	zt_interface.poll_event = zt_poll_event;
+	zt_interface.next_event = zt_next_event;
+
 	*zio = &zt_interface;
 
-	return ZAP_FAIL;
+	return ZAP_SUCCESS;
 }
 
 zap_status_t zt_destroy(void)