I’m am trying to send a fax (a tiffg3 file ) using asterisk 1.4 running on ubuntu out via a zap channel and ISDN to a fax machine.
i get this error:
[Jun 27 11:17:07] WARNING[20810]: channel.c:3059 set_format: Unable to find a codec translation path from unknown to unknown
[Jun 27 11:17:07] WARNING[20810]: app_txfax.c:266 txfax_exec: Unable to restore read format on ‘Zap/1-1’
can anybody suggest what configuration I am failing to do , or point me in the right direction for a howto on txfax using zap ( I’ve found plenty on rxfax using sip )
ISDN ports aren’t appropriate for sending fax messages. They don’t have the correct signalling.
You should consider sending the fax using something that’s designed to send the fax. Specifically a fax modem (analog) or a card like a Dialogic card (digital) with fax DSPs built into it.
Sorry if i wasn’t clear, this is a primary rate E1 trunk - Faxing is now working ( I needed to set faxdetect=both in zapata.conf before the channel definition ).
However it is not 100% reliable with broadcast fax, is there a variable I can check to tell me if the fax was successful ?