Tx-Frame Retry[-01] -- OSeqno: 002 ISeqno: 002 Type: IAX     Subclass: ACK    
   Timestamp: 00079ms  SCall: 00002  DCall: 00137 [207.174.202.3:4569]
Rx-Frame Retry[ No] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW    
   Timestamp: 00014ms  SCall: 00001  DCall: 00000 [65.39.204.72:4569]
   VERSION         : 2
   CALLED NUMBER   : 1NXXNXXXXXX
   CODEC_PREFS     : ()
   CALLING NUMBER  : NXXNXXXXXX
   CALLING PRESNTN : 0
   CALLING TYPEOFN : 0
   CALLING TRANSIT : 0
   CALLING NAME    : NXXNXXXXXX
   LANGUAGE        : en
   FORMAT          : 2
   CAPABILITY      : 65283
   ADSICPE         : 2
   DATE TIME       : 2006-08-14  03:21:16

Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 001 Type: IAX     Subclass: REJECT 
   Timestamp: 00012ms  SCall: 00003  DCall: 00001 [65.39.204.72:4569]
   CAUSE           : Unable to negotiate codec
   CAUSE CODE      : 58