T.38 negotiation error

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T.38 negotiation error

Postby sirioinformatica » Mon Jan 31, 2011 1:56 pm

Hi, I have asterisk 1.6.2.6 on a Debian Lenny system.
When I try to send a fax in T.38 mode I receive this error

ERROR[15035]: res_fax.c:795 set_fax_t38_caps: channel 'SIP/eutelia-sirio-out-00000000' is in an unsupported T.38 negotiation state, cannot continue.

In my sip.config general section I have added this lines
t38pt_udptl=yes
t38pt_rtp=no
t38pt_tcp=no

If I comment this lines, the fax is sended by G711 but this modality is too slow and instable.

How can I do to solve this problem?
Thank you
sirioinformatica
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Re: T.38 negotiation error

Postby sirioinformatica » Thu Feb 03, 2011 3:19 am

Nobody replies? Please!
sirioinformatica
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Re: T.38 negotiation error

Postby malcolmd » Thu Feb 03, 2011 12:13 pm

Hi,

Try the asterisk-users mailing list:

http://lists.digium.com/mailman/listinfo/asterisk-users

More folks there using Fax than on the forums.

Cheers.
Malcolm Davenport
Digium, Inc. | Senior Product Manager
malcolmd
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Re: T.38 negotiation error

Postby drTr0jan » Fri Mar 18, 2011 10:59 pm

Can you dump your SIP exchange between Asterisk and Gateway?
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Re: T.38 negotiation error

Postby zaib_kiani » Wed May 11, 2011 8:45 am

hi there,
i am getting below error
[May 11 15:54:29] WARNING[3363]: res_fax.c:1474 receivefax_t38_init: channel 'SIP/audiocodes.com-00000000' timed-out during the T.38 negotiation.

i am wondered what could be the issue, as the same provider is working fine on another asterisk server, both servers have similar asterisk version which is Asterisk 1.8.3.2. the server which is connected to the NETGEAR ROUTER is having issue. any one have any clue?
---
Jehanzaib
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