diff -Naur asterisk-87971.orig/channels/chan_misdn.c asterisk-87971.patched-misdnoneway/channels/chan_misdn.c
--- asterisk-87971.orig/channels/chan_misdn.c	2007-11-01 12:52:53.000000000 +0600
+++ asterisk-87971.patched-misdnoneway/channels/chan_misdn.c	2007-11-01 17:37:17.000000000 +0600
@@ -2851,6 +2851,7 @@
 		return NULL;
 	}
 
+	tmp->frame.frametype = AST_FRAME_VOICE;
 	tmp->frame.subclass = AST_FORMAT_ALAW;
 	tmp->frame.datalen = len;
 	tmp->frame.samples = len;