On 5/11/2013 6:09 PM, Olivier wrote:
Hello,
I've got an analog phone which is currently receiving unsollicited FAX
calls from PSTN.
For learning purpose, I'm preparing an Asterisk/SPA3102 setup that would
let voice calls come in and out and translate incoming FAX calls to TIF
files (forwarded through email)).
My target setup is :
PSTN <-- analog--> SPA3102 Line Port <-- SIP --> Asterisk <-- SIP -->
SPA3102 Phone Port <-- analog --> Analog phone
When a call comes in, analog phone rings.
If callee answers and a fax tone is detected, then the incoming call is
sent by Asterisk to ReceiveFAX application which translates incoming
audio to TIF file.
My setup is working ok when I'm using ReceiveFAX in fallback mode (with
f option).
Then I would like to improve my setup letting ReceiveFAX negociate T.38
with SPA3102.
The trouble is SPA3102, as I configured it, seems to refuse T.38
negociation as I'm reading lines like this in Asterisk logs:
== Using UDPTL CoS mark 5
[2013-11-05 10:36:50] WARNING[3061][C-00000007]: res_fax.c:1698
receivefax_t38_init: channel 'SIP/myline-0000000e' refused to negotiate T.38
My question is:
Any hint on how to configure SPA3102 PSTN Line port so that it would
accept to upgrade to T.38 ?
The SPA3102 only supports T.38 on the FXS port, the FXO port uses G711
for a fax session.
The Grandstream HT503 supports T.38 on both the FXO and FXS ports.
What problem do you have receiving a fax over G711?
Larry.
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