--- channels/chan_mgcp.c.orig	2008-08-13 14:45:39.000000000 +0200
+++ channels/chan_mgcp.c	2008-11-21 15:12:38.000000000 +0100
@@ -1460,14 +1506,15 @@
 #ifdef DLINK_BUGGY_FIRMWARE	
 		transmit_notify_request(sub, "rt");
 #else
-		transmit_notify_request(sub, sub->parent->ncs ? "L/rt" : "G/rt");
+		if(!sub->sdpsent) /* will hide the inband progress!!! */
+			transmit_notify_request(sub, sub->parent->ncs ? "L/rt" : "G/rt");
 #endif		
 		break;
 	case AST_CONTROL_BUSY:
 		transmit_notify_request(sub, "L/bz");
 		break;
 	case AST_CONTROL_CONGESTION: