This can be closed, I did a little more research and found this ws aknown problem in 1.4.13, I backed up to 1.4.12 and it is ok now. I shall track this before moving ahead again. It only affects certain devices and carriers, we just happen to have on of the carriers that did not deal with correctly. Incidentally the use yate as their tandem.

Darcy

----- Original Message -----

From: Darcy Primrose

To: FreeSWITCH Users Help

Sent: Monday, January 12, 2015 5:59 PM

Subject: [Freeswitch-users] fax relay question

We use a freeswitch as a relay between our carriers and other freeswitches, it has worked great until we upgraded to the latest freeswitch version recently

We we receive a fax, inbound and relay it, the subsequent re invite we get back looks like the frist block below, then when the freeswitch relays it, it adds

in " Media Description, name and address (m): audio 0 RTP/AVP 19". The originating carrier sees this and responds with audio instead of T38, the call drops.

Any hints would be greatly appreaciated, I do not really want to go back to a previous release if I can avoid it.

            Connection Information (c): IN IP4 98.158.137.200
            Time Description, active time (t): 0 0
            Media Description, name and address (m): image 18392 udptl t38
            Media Attribute (a): T38FaxVersion:0
            Media Attribute (a): T38MaxBitRate:14400
            Media Attribute (a): T38FaxFillBitRemoval
            Media Attribute (a): T38FaxRateManagement:transferredTCF
            Media Attribute (a): T38FaxMaxBuffer:2000
            Media Attribute (a): T38FaxMaxDatagram:400
            Media Attribute (a): T38FaxUdpEC:t38UDPRedundancy

            Connection Information (c): IN IP4 98.158.137.200
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 0 RTP/AVP 19
            Media Description, name and address (m): image 18392 udptl t38
            Media Attribute (a): T38FaxVersion:0
            Media Attribute (a): T38MaxBitRate:14400
            Media Attribute (a): T38FaxFillBitRemoval
            Media Attribute (a): T38FaxRateManagement:transferredTCF
            Media Attribute (a): T38FaxMaxBuffer:2000
            Media Attribute (a): T38FaxMaxDatagram:400
            Media Attribute (a): T38FaxUdpEC:t38UDPRedundancy

Darcy

Voice2Net

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