diff --git a/libs/spandsp/src/t4_tx.c b/libs/spandsp/src/t4_tx.c
index 5c35fdb0b4..f349a136c5 100644
--- a/libs/spandsp/src/t4_tx.c
+++ b/libs/spandsp/src/t4_tx.c
@@ -1863,7 +1863,7 @@ SPAN_DECLARE(int) t4_tx_set_tx_image_format(t4_tx_state_t *s,
                 s->metadata.image_type = T4_IMAGE_TYPE_BILEVEL;
             }
             /* Squashing to a bi-level image is possible */
-            span_log(&s->logging, SPAN_LOG_FLOW, "The image may be flattened to %d\n", s->metadata.image_type);
+            span_log(&s->logging, SPAN_LOG_FLOW, "The image will be flattened to %d\n", s->metadata.image_type);
         }
     }
 
diff --git a/src/mod/applications/mod_spandsp/mod_spandsp.c b/src/mod/applications/mod_spandsp/mod_spandsp.c
index 51e2505758..b6ff1771de 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp.c
+++ b/src/mod/applications/mod_spandsp/mod_spandsp.c
@@ -577,6 +577,26 @@ switch_status_t load_configuration(switch_bool_t reload)
 						spandsp_globals.disable_v17 = 1;
 					else
 						spandsp_globals.disable_v17 = 0;
+				} else if (!strcmp(name, "enable-colour")) {
+					if (switch_true(value))
+						spandsp_globals.enable_colour_fax = 1;
+					else
+						spandsp_globals.enable_colour_fax = 0;
+				} else if (!strcmp(name, "enable-image-resizing")) {
+					if (switch_true(value))
+						spandsp_globals.enable_image_resizing = 1;
+					else
+						spandsp_globals.enable_image_resizing = 0;
+				} else if (!strcmp(name, "enable-colour-to-bilevel")) {
+					if (switch_true(value))
+						spandsp_globals.enable_colour_to_bilevel = 1;
+					else
+						spandsp_globals.enable_colour_to_bilevel = 0;
+				} else if (!strcmp(name, "enable-grayscale-to-bilevel")) {
+					if (switch_true(value))
+						spandsp_globals.enable_grayscale_to_bilevel = 1;
+					else
+						spandsp_globals.enable_grayscale_to_bilevel = 0;
 				} else if (!strcmp(name, "enable-t38")) {
 					if (switch_true(value)) {
 						spandsp_globals.enable_t38= 1;
diff --git a/src/mod/applications/mod_spandsp/mod_spandsp.h b/src/mod/applications/mod_spandsp/mod_spandsp.h
index 323ff07a45..5f5a038c43 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp.h
+++ b/src/mod/applications/mod_spandsp/mod_spandsp.h
@@ -60,6 +60,10 @@ struct spandsp_globals {
 	short int use_ecm;
 	short int verbose;
 	short int disable_v17;
+	short int enable_colour_fax;
+	short int enable_image_resizing;
+	short int enable_colour_to_bilevel;
+	short int enable_grayscale_to_bilevel;
 	short int enable_t38;
 	short int enable_t38_request;
 	short int enable_t38_insist;
diff --git a/src/mod/applications/mod_spandsp/mod_spandsp_fax.c b/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
index 21a9cc51dc..993e44c0a5 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
+++ b/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
@@ -89,6 +89,10 @@ struct pvt_s {
 
 	int use_ecm;
 	int disable_v17;
+	int enable_colour_fax;
+	int enable_image_resizing;
+	int enable_colour_to_bilevel;
+	int enable_grayscale_to_bilevel;
 	int verbose;
 	int caller;
 
@@ -693,6 +697,7 @@ static switch_status_t spanfax_init(pvt_t *pvt, transport_mode_t trans_mode)
     const char *tz;
 	int fec_entries = DEFAULT_FEC_ENTRIES;
 	int fec_span = DEFAULT_FEC_SPAN;
+	int compressions;
 
 
 	session = (switch_core_session_t *) pvt->session;
@@ -872,8 +877,12 @@ static switch_status_t spanfax_init(pvt_t *pvt, transport_mode_t trans_mode)
 	t30_set_phase_b_handler(t30, phase_b_handler, pvt);
 
 	t30_set_supported_image_sizes(t30,
-								  T4_SUPPORT_LENGTH_US_LETTER | T4_SUPPORT_LENGTH_US_LEGAL | T4_SUPPORT_LENGTH_UNLIMITED
-								| T4_SUPPORT_WIDTH_215MM | T4_SUPPORT_WIDTH_255MM | T4_SUPPORT_WIDTH_303MM);
+								  T4_SUPPORT_LENGTH_US_LETTER
+								| T4_SUPPORT_LENGTH_US_LEGAL
+								| T4_SUPPORT_LENGTH_UNLIMITED
+								| T4_SUPPORT_WIDTH_215MM
+								| T4_SUPPORT_WIDTH_255MM
+								| T4_SUPPORT_WIDTH_303MM);
 	t30_set_supported_bilevel_resolutions(t30,
 										  T4_RESOLUTION_R8_STANDARD
 										| T4_RESOLUTION_R8_FINE
@@ -883,7 +892,28 @@ static switch_status_t spanfax_init(pvt_t *pvt, transport_mode_t trans_mode)
                                         | T4_RESOLUTION_200_200
                                         | T4_RESOLUTION_200_400
                                         | T4_RESOLUTION_400_400);
-	t30_set_supported_colour_resolutions(t30, 0);
+	compressions = T4_COMPRESSION_T4_1D
+				 | T4_COMPRESSION_T4_2D
+				 | T4_COMPRESSION_T6
+				 | T4_COMPRESSION_T85
+				 | T4_COMPRESSION_T85_L0;
+	if (pvt->enable_colour_fax) {
+		t30_set_supported_colour_resolutions(t30, T4_RESOLUTION_100_100
+												| T4_RESOLUTION_200_200
+												| T4_RESOLUTION_300_300
+												| T4_RESOLUTION_400_400);
+		compressions |= (T4_COMPRESSION_COLOUR | T4_COMPRESSION_T42_T81);
+	} else {
+		t30_set_supported_colour_resolutions(t30, 0);
+	}
+	if (pvt->enable_image_resizing)
+		compressions |= T4_COMPRESSION_RESCALING;
+	if (pvt->enable_colour_to_bilevel)
+		compressions |= T4_COMPRESSION_COLOUR_TO_BILEVEL;
+	if (pvt->enable_grayscale_to_bilevel)
+		compressions |= T4_COMPRESSION_GRAY_TO_BILEVEL;
+
+	t30_set_supported_compressions(t30, compressions);
 
 	if (pvt->disable_v17) {
 		t30_set_supported_modems(t30, T30_SUPPORT_V29 | T30_SUPPORT_V27TER);
@@ -894,11 +924,10 @@ static switch_status_t spanfax_init(pvt_t *pvt, transport_mode_t trans_mode)
 	}
 
 	if (pvt->use_ecm) {
-		t30_set_supported_compressions(t30, T4_COMPRESSION_T4_1D | T4_COMPRESSION_T4_2D | T4_COMPRESSION_T6 | T4_COMPRESSION_T85 | T4_COMPRESSION_T85_L0);
 		t30_set_ecm_capability(t30, TRUE);
 		switch_channel_set_variable(channel, "fax_ecm_requested", "1");
 	} else {
-		t30_set_supported_compressions(t30, T4_COMPRESSION_T4_1D | T4_COMPRESSION_T4_2D);
+		t30_set_ecm_capability(t30, FALSE);
 		switch_channel_set_variable(channel, "fax_ecm_requested", "0");
 	}
 
@@ -1217,6 +1246,30 @@ static pvt_t *pvt_init(switch_core_session_t *session, mod_spandsp_fax_applicati
 		pvt->disable_v17 = spandsp_globals.disable_v17;
 	}
 
+	if ((tmp = switch_channel_get_variable(channel, "fax_enable_colour"))) {
+		pvt->enable_colour_fax = switch_true(tmp);
+	} else {
+		pvt->enable_colour_fax = spandsp_globals.enable_colour_fax;
+	}
+
+	if ((tmp = switch_channel_get_variable(channel, "fax_enable_image_resizing"))) {
+		pvt->enable_image_resizing = switch_true(tmp);
+	} else {
+		pvt->enable_image_resizing = spandsp_globals.enable_image_resizing;
+	}
+
+	if ((tmp = switch_channel_get_variable(channel, "fax_enable_colour_to_bilevel"))) {
+		pvt->enable_colour_to_bilevel = switch_true(tmp);
+	} else {
+		pvt->enable_colour_to_bilevel = spandsp_globals.enable_colour_to_bilevel;
+	}
+
+	if ((tmp = switch_channel_get_variable(channel, "fax_enable_grayscale_to_bilevel"))) {
+		pvt->enable_grayscale_to_bilevel = switch_true(tmp);
+	} else {
+		pvt->enable_grayscale_to_bilevel = spandsp_globals.enable_grayscale_to_bilevel;
+	}
+
 	if ((tmp = switch_channel_get_variable(channel, "fax_verbose"))) {
 		pvt->verbose = switch_true(tmp);
 	} else {