diff -Naur asterisk-11.7.0/res/res_rtp_asterisk.c asterisk-11.7.0_edited_rtpfix/res/res_rtp_asterisk.c
--- asterisk-11.7.0/res/res_rtp_asterisk.c	2013-10-23 19:37:15.000000000 +0200
+++ asterisk-11.7.0_edited_rtpfix/res/res_rtp_asterisk.c	2014-02-25 14:36:35.835010747 +0100
@@ -2564,9 +2564,9 @@
 		rtp->lastdigitts = rtp->lastts;
 	}
 
-	if (ast_test_flag(frame, AST_FRFLAG_HAS_TIMING_INFO)) {
+	/*if (ast_test_flag(frame, AST_FRFLAG_HAS_TIMING_INFO)) {
 		rtp->lastts = frame->ts * rate;
-	}
+	}*/
 
 	ast_rtp_instance_get_remote_address(instance, &remote_address);