[iaxmodem-users] Iaxmodem - outgoing faxes fail on handshaking

[Paul A. <pau...@fi...>]

Hi,

For reference, I am using CentOS 5.4, Asterisk 1.6.1.6, HylaFax+ 5.2.9, IaxModem 1.2.0 - all on the same machine.

Asterisk is connected to the outside world using a RedFone twin PRI device.  One PRI connection to the PSTN, one to a Nortel Option 11c PBX.

I have 11 Iaxmodems installed on this machine.  All are set to use ULAW, all have jitterbuffer=no set in iax.conf.  All appear in Asterisk OK.  All appear in faxstat ok.


All faxes are received without error.

All outgoing faxes dial the number via Asterisk, connect, & then begin handshaking.  All faxes fail with the error "Failure to train remote modem at 2400 bps or minimum speed ; Giving up after 3 attempts to send same page"

Internet reading suggest this is an audio quality issue - but, if it is, I do not understand why?  All faxes receive ok.  Also - I have a Linksys 3102 device connected to an analogue fax machine - and this setup faxes out just fine using Asterisk, (ULAW SIP to Asterisk, then out to the PSTN).  If anything - the Linksys / fax machine setup should be less reliable then Iaxmodem because it's remote from the Asterisk box???


I'm close to my goal of a single PBX for phone & fax - I would really welcome some help to track down the issue here...


Regards

Paul Adams