[asterisk-users] T.38 troubles

[Jean-Denis Girard]

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Hi list,

I'm having difficulties when receiving faxes from the PSTN with this
relatively simple installation:
   PSTN <--PRI--> GW <--T.38--> Asterisk

The gateway is a Mediatrix 3301 (firmware Dgw 2.0.14.251). It's
configured to transmit faxes as T.38. I may have missed something in its
configuration, but it does switch to T.38 when a fax is detected. On the
Asterisk side, I'm using 10.2.1 with spandsp-0.0.6-pre20 and ReceiveFax
from res_fax_spandsp. ${FAXSTATUS} returns FAILED and ${FAXERROR}
"Disconnected after permitted retries".

I did a network capture, attached to this mail: from my understanding,
T.38 is accepted by Asterisk, then there seems to be some UDPTL traffic,
which I don't understand...

Why does it fail, and what is wrong? I'd appreciate if someone could
send me advice / suggestions.


Thanks,
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Jean-Denis Girard

SysNux                  Systèmes  Linux  en Polynésie française
http://www.sysnux.pf/   Tél: +689 50 10 40 / GSM: +689 79 75 27
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