Add new option to request TEP to be used for an outbound fax call

src/mod/applications/mod_spandsp/mod_spandsp.c

@@ -508,6 +508,7 @@ switch_status_t load_configuration(switch_bool_t reload)
 
 
 	spandsp_globals.enable_t38 = 1;
+	spandsp_globals.enable_tep = 0;
 	spandsp_globals.total_sessions = 0;
 	spandsp_globals.verbose = 0;
 	spandsp_globals.use_ecm = 1;
@@ -608,6 +609,12 @@ switch_status_t load_configuration(switch_bool_t reload)
 						spandsp_globals.enable_grayscale_to_bilevel = 1;
 					else
 						spandsp_globals.enable_grayscale_to_bilevel = 0;
+				} else if (!strcmp(name, "enable-tep")) {
+					if (switch_true(value)) {
+						spandsp_globals.enable_tep= 1;
+					} else {
+						spandsp_globals.enable_tep = 0;
+					}
 				} else if (!strcmp(name, "enable-t38")) {
 					if (switch_true(value)) {
 						spandsp_globals.enable_t38= 1;

src/mod/applications/mod_spandsp/mod_spandsp.h

@@ -60,6 +60,7 @@ struct spandsp_globals {
 	short int use_ecm;
 	short int verbose;
 	short int disable_v17;
+	short int enable_tep;
 	short int enable_colour_fax;
 	short int enable_image_resizing;
 	short int enable_colour_to_bilevel;

src/mod/applications/mod_spandsp/mod_spandsp_fax.c

@@ -90,6 +90,7 @@ struct pvt_s {
 
 	int use_ecm;
 	int disable_v17;
+	int enable_tep;
 	int enable_colour_fax;
 	int enable_image_resizing;
 	int enable_colour_to_bilevel;
@@ -835,6 +836,8 @@ static switch_status_t spanfax_init(pvt_t *pvt, transport_mode_t trans_mode)
 			t38_gateway_set_supported_modems(pvt->t38_gateway_state, T30_SUPPORT_V17 | T30_SUPPORT_V29 | T30_SUPPORT_V27TER);
 		}
 
+		t38_gateway_set_tep_mode(pvt->t38_gateway_state, pvt->enable_tep);
+
 		t38_gateway_set_ecm_capability(pvt->t38_gateway_state, pvt->use_ecm);
 		switch_channel_set_variable(channel, "fax_ecm_requested", pvt->use_ecm ? "true" : "false");
 
@@ -1240,6 +1243,12 @@ static pvt_t *pvt_init(switch_core_session_t *session, mod_spandsp_fax_applicati
 		pvt->use_ecm = spandsp_globals.use_ecm;
 	}
 
+	if ((tmp = switch_channel_get_variable(channel, "fax_enable_tep"))) {
+		pvt->enable_tep = switch_true(tmp);
+	} else {
+		pvt->enable_tep = spandsp_globals.enable_tep;
+	}
+
 	if ((tmp = switch_channel_get_variable(channel, "fax_disable_v17"))) {
 		pvt->disable_v17 = switch_true(tmp);
 	} else {