Index: channels/chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.292.2.26
diff -u -r1.292.2.26 chan_sip.c
--- channels/chan_sip.c	1 Apr 2004 06:35:17 -0000	1.292.2.26
+++ channels/chan_sip.c	6 Apr 2004 08:51:41 -0000
@@ -1482,6 +1482,8 @@
                 if (i->dtmfmode & SIP_DTMF_INBAND) {
                     i->vad = ast_dsp_new();
                     ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
+                    if (!(fmt & AST_FORMAT_ULAW) && !(fmt & AST_FORMAT_ALAW))
+                       ast_log(LOG_WARNING, "DTMF mode INBAND with incompatible codec %s (Use another codec or DTMF mode)\n", ast_getformatname(fmt));
                 }
 		tmp->fds[0] = ast_rtp_fd(i->rtp);
 		tmp->fds[1] = ast_rtcp_fd(i->rtp);