T.38 Gateway

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Hi everyone, 

we're trying to setup a fax gateway from PRI to SIP. Our test setup consists of two asterisk 10 machines connected over PRI and a third one which is acting as a fax endpoint over SIP.

On the machine which is receiving over PRI, we see the following message:

[Jul 23 12:54:23] DEBUG[18288] res_fax.c: detected v21 preamble on SIP/xxx.xxx.xxx.xxx-00000001, but DAHDI/i1/-2 does not support T.38 for T.38 gateway session

The relevant dialplan part looks like this:

[from-pstn]
exten => _X,1,Verbose(1,"Entering from-pstn context")
exten => _X,n,Set(FAXOPT(gateway)=yes)
exten => _X,n,Dial(SIP/12345@xxxxxxxxxxxxxxx)

Fax capabilites are working apparently:

*CLI> fax show capabilities

Registered FAX Technology Modules:

Type            : Spandsp
Description     : Spandsp FAX Driver
Capabilities    : SEND RECEIVE T.38 G.711 GATEWAY

Any idea what could be wrong?

Thanks in advance for any help



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