On 08/31/2011 01:15 AM, Fabian Borot wrote:
will installing spandsp help with t.38 pass-through?
The only part of spandsp which is relevant to T.38 passthrough is its
modem tone detection module, and I don't think the standard Asterisk
distribution can make use of that. Some people do use it, to overcome
the limitations in Asterisk's own tone detection, but I don't think they
make their patches available.
Steve
------------------------------------------------------------------------
From: fbo...@hotmail.com
To: asterisk-users@lists.digium.com
Subject: RE: T.38 passthru on 1.8.5
Date: Tue, 30 Aug 2011 11:42:41 -0400
both endpoints use public Ips, I just changed the real ones for the
privates ones to protect our ips but made a mistake and left the dest
as a pub and the orig as private, my bad.
but for the record, both are public IPs, there is no nat and iptables
is off
also, I see that the quintum sends a lot of these packages but
asterisk sends only 1 or 2 to the other side.
------------------------------------------------------------------------
From: fbo...@hotmail.com
To: asterisk-users@lists.digium.com
Subject: T.38 passthru on 1.8.5
Date: Tue, 30 Aug 2011 09:44:15 -0400
Hello
We want to implement T.38 passthru with asterisk 1.8.5 [Asterisk
1.8.5.0 built by root @ asterisk1-8.labdomain.com on a x86_64 running
Linux on 2011-08-26 21:31:22 UTC]
The call flow is:
quintum gateway --> asterisk --> Dialogic IMG 1010
the call starts as a voice call, the remote fax picks up and we hear
the fax tone, the we see the re-invite from the IMG asking for t.38,
the RE-Invite is passed back to the user side [quintum gateway] whcih
reply with 200 OK with t.38 and the nothing else happens. After 20
secs of "inactivity" the quintum sends another Invite with voice only
and then a BYE.
We do see that the quintum sends a lot of messages like this from the
quintum's IP [192.168.1.18] but we do not see that asterisk sends the
packages to the destination
UDPTL (SIP/2345850624337933): packet to 192.30.189.146:12020 (type 0,
seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
UDPTL (SIP/): packet from 192.168.1.18:10260 (type 0, seq 0, len 6)
we have this settings on sip.conf
faxdetect = yes
t38pt_udptl = yes,maxdatagram=400 [I have tested with several
combinations t38pt_udptl = yes;t38pt_udptl = yes,fec etc]
When we send the fax from the quintum to the Dialogic IMG the fax
works 100% of the times.
I enabled fax set debug on and udptl set debug on but the console does
not show almost anything but the udptl packets shown above.
What else should I do?Any ideas/help is greatly appreciated
txs a lot
fborot
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