Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 393589)
+++ channels/chan_sip.c	(working copy)
@@ -10635,7 +10635,7 @@
 
 	/* Setup audio address and port */
 	if (p->rtp) {
-		if (portno > 0) {
+		if (sa && portno > 0) {
 			start_ice(p->rtp);
 			ast_sockaddr_set_port(sa, portno);
 			ast_rtp_instance_set_remote_address(p->rtp, sa);
@@ -10683,7 +10683,7 @@
 
 	/* Setup video address and port */
 	if (p->vrtp) {
-		if (vportno > 0) {
+		if (vsa && vportno > 0) {
 			start_ice(p->vrtp);
 			ast_sockaddr_set_port(vsa, vportno);
 			ast_rtp_instance_set_remote_address(p->vrtp, vsa);
@@ -10701,7 +10701,7 @@
 
 	/* Setup text address and port */
 	if (p->trtp) {
-		if (tportno > 0) {
+		if (tsa && tportno > 0) {
 			start_ice(p->trtp);
 			ast_sockaddr_set_port(tsa, tportno);
 			ast_rtp_instance_set_remote_address(p->trtp, tsa);
@@ -10725,7 +10725,7 @@
 
 	/* Setup image address and port */
 	if (p->udptl) {
-		if (udptlportno > 0) {
+		if (isa && udptlportno > 0) {
 			if (ast_test_flag(&p->flags[1], SIP_PAGE2_SYMMETRICRTP) && ast_test_flag(&p->flags[1], SIP_PAGE2_UDPTL_DESTINATION)) {
 				ast_rtp_instance_get_remote_address(p->rtp, isa);
 				if (!ast_sockaddr_isnull(isa) && debug) {