Merged revisions 277530 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

................
  r277530 | mnicholson | 2010-07-16 16:24:45 -0500 (Fri, 16 Jul 2010) | 11 lines
  
  Merged revisions 277497 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r277497 | mnicholson | 2010-07-16 16:18:38 -0500 (Fri, 16 Jul 2010) | 4 lines
    
    Default to no udptl error correction so that error correction will be disabled in the event that the remote end indicates that they do not support the error correction mode we requested.
    
    FAX-128
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@277563 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -8324,6 +8324,10 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
 
 			if (p->t38.state != T38_ENABLED) {
 				memset(&p->t38.their_parms, 0, sizeof(p->t38.their_parms));
+
+				/* default EC to none, the remote end should
+				 * respond with the EC they want to use */
+				ast_udptl_set_error_correction_scheme(p->udptl, UDPTL_ERROR_CORRECTION_NONE);
 			}
 		} else {
 			ast_log(LOG_WARNING, "Unsupported SDP media type in offer: %s\n", m);