troubleshooting Question

Intermittent no audio on incoming calls

Avatar of MadBarry101
MadBarry101 asked on
Voice Over IPIP Telephony
17 Comments1 Solution1511 ViewsLast Modified:
First ever question so hope everything is ok with information provided.

OS: CentOS
PS: AsteriskNOW

We seem to be having intermittent audio issues on our incoming IAX calls, out of 10 calls placed 4 calls worked perfectly and 6 calls failed with no audio. When we place a call to our phone system from an external landline/mobile they are not hearing anything at their end (even though our phone is ringing) when answered the line still has no audio and after a short period of time the call disconnects. As part of the troubleshooting we gave the server a public ip and disabled apf, flushed all the rules out of iptables, set DTMF to auto and allow alaw only. Below is an iax debug output on a call without audio.

Thanks for your time.

Additional note:
We have more IAX DDIs that are working without any problems all coming over the same trunk, the only thing different is that this number was ported from BT

Rx-Frame Retry[ No] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   Timestamp: 00005ms  SCall: 00034  DCall: 00000 [a.b.c.d:4569]
   VERSION         : 2
   CALLED NUMBER   : <masked>
   CODEC_PREFS     : ()
   CALLING NUMBER  : <masked>
   CALLING PRESNTN : 0
   CALLING TYPEOFN : 0
   CALLING TRANSIT : 0
   CALLING NAME    : <masked>
   LANGUAGE        : en
   USERNAME        : <masked>
   FORMAT          : 8
   CAPABILITY      : 65407
   ADSICPE         : 2
   DATE TIME       : 2009-12-16  22:22:58
79*CLI>
Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 001 Type: IAX     Subclass: AUTHREQ
   Timestamp: 00012ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
   AUTHMETHODS     : 3
   CHALLENGE       : 393122854
   USERNAME        : <masked>

Rx-Frame Retry[ No] -- OSeqno: 001 ISeqno: 001 Type: IAX     Subclass: AUTHREP
   Timestamp: 00052ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
   MD5 RESULT      : <masked>
79*CLI>
Tx-Frame Retry[000] -- OSeqno: 001 ISeqno: 002 Type: IAX     Subclass: ACCEPT
   Timestamp: 00055ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
   FORMAT          : 8

Rx-Frame Retry[ No] -- OSeqno: 002 ISeqno: 002 Type: IAX     Subclass: ACK
   Timestamp: 00055ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
Tx-Frame Retry[000] -- OSeqno: 002 ISeqno: 002 Type: CONTROL Subclass: RINGING
   Timestamp: 00058ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
Rx-Frame Retry[ No] -- OSeqno: 002 ISeqno: 003 Type: IAX     Subclass: ACK
   Timestamp: 00058ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
Rx-Frame Retry[ No] -- OSeqno: 002 ISeqno: 003 Type: IAX     Subclass: LAGRQ
   Timestamp: 10004ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
Tx-Frame Retry[000] -- OSeqno: 003 ISeqno: 003 Type: IAX     Subclass: LAGRP
   Timestamp: 10004ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
Tx-Frame Retry[000] -- OSeqno: 004 ISeqno: 003 Type: IAX     Subclass: LAGRQ
   Timestamp: 10012ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
Rx-Frame Retry[ No] -- OSeqno: 003 ISeqno: 004 Type: IAX     Subclass: ACK
   Timestamp: 10004ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
Rx-Frame Retry[ No] -- OSeqno: 003 ISeqno: 005 Type: IAX     Subclass: LAGRP
   Timestamp: 10012ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
Tx-Frame Retry[-01] -- OSeqno: 005 ISeqno: 004 Type: IAX     Subclass: ACK
   Timestamp: 10012ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
Rx-Frame Retry[ No] -- OSeqno: 004 ISeqno: 005 Type: IAX     Subclass: HANGUP
   Timestamp: 19065ms  SCall: 00034  DCall: 00438 [a.b.c.d:4569]
   CAUSE CODE      : 0
79*CLI>
Tx-Frame Retry[-01] -- OSeqno: 005 ISeqno: 005 Type: IAX     Subclass: ACK
   Timestamp: 19065ms  SCall: 00438  DCall: 00034 [a.b.c.d:4569]
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