Mine

Rx-Frame Retry[ No] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW    
   Timestamp: 00003ms  SCall: 00275  DCall: 00000 [208.100.6.10:4569]
   VERSION         : 2
   CALLED NUMBER   : 2562321816
   CODEC_PREFS     : (ulaw)
   CALLING NUMBER  : 2567774253
   CALLING PRESNTN : 0
   CALLING TYPEOFN : 0
   CALLING TRANSIT : 0
   LANGUAGE        : en
   FORMAT          : 4
   CAPABILITY      : 63492
   ADSICPE         : 2
   DATE TIME       : 2007-04-26  21:35:02

[Apr 26 21:35:15] WARNING[3950]: channel.c:712 ast_best_codec: Don't know any of 0xe000 formats
[Apr 26 21:35:15] ERROR[3950]: chan_iax2.c:6875 socket_process: No best format in 0xe000???
[Apr 26 21:35:15] NOTICE[3950]: chan_iax2.c:6878 socket_process: Rejected connect attempt from 208.100.6.10, requested/capability 0x4/0xf804 incompatible with our capability 0xe703.
Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 001 Type: IAX     Subclass: REJECT 
   Timestamp: 00004ms  SCall: 00001  DCall: 00275 [208.100.6.10:4569]
   CAUSE           : Unable to negotiate codec
   CAUSE CODE      : 58

Rx-Frame Retry[ No] -- OSeqno: 001 ISeqno: 001 Type: IAX     Subclass: ACK    
   Timestamp: 00004ms  SCall: 00275  DCall: 00001 [208.100.6.10:4569]