[asterisk-users] $100 Bounty: Level 3/Asterisk/Adtran T.38 Pass-Through

[Dmitry]

Use "tcpdump" utility, capture all udp packets for the faulty t38 fax call. 

T38 works reliably since asterisk 1.6. 

Wireshark utility shows t38 signals so it is possible to debug it.



________________________________
 From: Eric Wieling <EWieling at nyigc.com>
To: "bryantz at zktech.com" <bryantz at zktech.com>; Asterisk Users Mailing List - Non-Commercial Discussion <asterisk-users at lists.digium.com> 
Sent: Tuesday, January 1, 2013 12:10 AM
Subject: Re: [asterisk-users] $100 Bounty: Level 3/Asterisk/Adtran T.38 Pass-Through
 
Do you use faxdetect at all?  I'm wondering if faxdetect is required for Asterisk to set CHANNEL(t38passthrough) to 1.  It is set to zero on fax calls passing through Asterisk.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Bryant Zimmerman
Sent: Thursday, December 27, 2012 6:52 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] $100 Bounty: Level 3/Asterisk/Adtran T.38 Pass-Through

We process a lot of t.38 with Level 3 and our Asterisk servers. We do not prefer Adtran end points for t.38. 


Thanks

Bryant Zimmerman (ZK Tech Inc.)
616-855-1030 Ext. 2003


________________________________

From: "Danny Nicholas" <danny at debsinc.com>
Sent: Thursday, December 27, 2012 4:51 PM
To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
Subject: Re: [asterisk-users] $100 Bounty: Level 3/Asterisk/Adtran T.38 Pass-Through

Not certain that you actually do. I do know that T.38 can be a "dental"
experience with Asterisk, but some folks have succeeded with it.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Eric Wieling
Sent: Thursday, December 27, 2012 3:37 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] $100 Bounty: Level 3/Asterisk/Adtran T.38 Pass-Through

I was not aware you needed SpanDSP for T.38 passthrough.. How will that work with the UDPTL packets not going through Asterisk.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Danny Nicholas
Sent: Thursday, December 27, 2012 4:29 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] $100 Bounty: Level 3/Asterisk/Adtran T.38 Pass-Through

#1 I assume you have spandsp installed

#2 I'm guessing you got some hints from this thread -
https://issues.asterisk.org/jira/browse/ASTERISK-18394 ?


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