diff -ubBr asterisk-1.2.7.1-orig/channels/h323/ast_h323.cpp asterisk-1.2.7.1/channels/h323/ast_h323.cpp
--- asterisk-1.2.7.1-orig/channels/h323/ast_h323.cpp	2005-11-30 00:24:39.000000000 +0600
+++ asterisk-1.2.7.1/channels/h323/ast_h323.cpp	2006-05-03 18:51:01.000000000 +0700
@@ -1061,6 +1061,9 @@
 		localIpAddr = info->addr;
 		localPort = info->port;
 		/* tell the H.323 stack  */ 
+
+    const H323Transport & transport = connection.GetControlChannel();
+    transport.GetLocalAddress().GetIpAddress(localIpAddr);
 		SetExternalAddress(H323TransportAddress(localIpAddr, localPort), H323TransportAddress(localIpAddr, localPort + 1));
 		/* clean up allocated memory */
 		free(info);