[asterisk-users] Asterisk 1.6 ReceiveFAX problem

[Steve Underwood]

MaxGao wrote:
> hi,all
> i have just set up asterisk 1.6.0.7 rc1 with spandsp 0.0.5 pre4 to 
> ReceiveFAX, link to a E1 (DE410P) using dahdi
> this can receive the fax from E1 successfully, but i see many error 
> message in the log like this:
>
> [Mar 16 09:24:38] ERROR[23540] channel.c: ast_read() called with no 
> recorded file descriptor.
> when i receive a 5 pages fax, i will see this error message over 200 
> lines.....
> it seems the channel.c try to call ast_read(), read some bytes from 
> the channel but there is nothing ...
> whether it's a loop to check data on the channel ?
> and many times when reciving tax , the E1 card will down , all the 
> channel get red alarm...
> [Mar 16 09:49:19] DEBUG[20928] chan_dahdi.c: Monitor doohicky got 
> event Alarm on channel 2
> [Mar 16 09:49:19] WARNING[20928] chan_dahdi.c: Detected alarm on 
> channel 2: Recovering
> i then try asterisk 1.4.23.2 and agx-ast-addon , when using spandsp 
> 0.0.5 and spandsp 0.0.6, like above , sometimes all E1 channel get red 
> alarm when reciving fax....
> but use spandsp 0.0.4 get no error...
> some one can tell me what version of asterisk and spandsp is the best 
> version for fax???
> thanks a lot.
Red alarms have nothing whatsoever to do with FAXing, or even Asterisk. 
They only relate to the state of the line, the card, and the 
dahdi/zaptel drivers. You'd better sort that out before expecting any 
application to work.

Regards,
Steve