Hi,
in addition to FAXOPT(gateway) you may try to request transmission
medium from telco - see SS7_TMR or SS7_TMR_NUM, as it should be set on
the outgoing (dahdi) channel you need to set it on the SIP channel with
underscore (_SS7_TMR)
The possible options are defined in libss7.h and SS7_TMR_3K1_AUDIO (or 3
as num) works fine here. If you can detect the fax calls you may request
64K_UNRESTRICTED data for them
On 2014-08-22 15:47, Huseyin Kaya wrote:
Hello
I am using Sangoma A104DE with libss7 on Asterisk 11.5.0 and
terminating calls to telco with ss7 . We are using patched version of
Libss7 that have timers
functionality.(https://issues.asterisk.org/jira/browse/SS7-27)
The server is on production for the last 6 months and everything was
fine
My interconnection with telco is only one way. From sip to ss7 .
Everything is fine except one thing.
One of my customers asked for t38 faxing. then i found myself in
trouble.
I get several sip traces and found the problem at the end .When i
receive an invite T38 , asterisk is sending 200 OK message but in SDP
it is sending g711u,g711a,g729 as codecs. So after this point
everything is messed up.
I tried to set t38pt_udptl=no in sip.conf , but still asterisk is
sending sip 200 ok with sdp g711...
ı tried to set t38pt_udptl = yes,redundancy,maxdatagram=400 and
setvar=FAXOPT(gateway)=yes,20 in sip.conf but still i couldn't manage
to receive fax
So basically what i need to send fax from sip to telco but could not
manage to do till now.
Everything except fax is working like a charm.
Is anyone succeed to handle fax with libss7.
I will be glad if an expert can show me a way to achive this.
Best Regards
--
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