[Freeswitch-users] T38 Fax, 488 Not Acceptable here

[Brian West]

Send your faxes out a different provider that doesn't trigger session
timers to come back on, or introduce your customers to email. ;)  I'm
trying to figure out how to support this currently.


/b


On Wed, Mar 1, 2017 at 12:57 PM, Jai Rangi <jprangi at gmail.com> wrote:

> sessiontimer is off on my side, but I cant control carrier. Any suggested
> workaround? Or say sorry to my customers and loose them.
>
> On Wed, Mar 1, 2017 at 10:47 AM, Brian West <brian at freeswitch.org> wrote:
>
>> This is actually on purpose, see note in code.
>>
>> See sofia.c
>>
>> /* Refuse all re-invites once we are doing T.38 */
>>
>>             nua_respond(nh, SIP_488_NOT_ACCEPTABLE, TAG_END());
>>
>>             switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DEST
>> INATION);
>>
>>
>> https://freeswitch.org/jira/browse/FS-10059
>>
>> I can replicate it and I'm aware of it, turn off session timers if
>> possible.
>>
>> /b
>>
>> On Wed, Mar 1, 2017 at 11:34 AM, Jai Rangi <jprangi at gmail.com> wrote:
>>
>>> Why would FS reply with 488 not acceptable on Re-invite for T38 and the
>>> disconnect it.
>>> Here is the scenario.
>>> It only a leg, so no trans-coding etc.
>>>
>>> FS Sends Invite to Carrier
>>> Get 200 OK
>>> Send ACK.
>>> Send Re-invite with T38 in SDP.
>>> Got 200 OK,
>>> Fax starts.
>>> Everything is fine so far.
>>> After 15 Minutes,
>>> Gets a Re-invite  from Carrier with T.38 in SDP. (
>>> FS Reply with 488 Not Acceptable Here
>>> Send Bye.
>>>
>>> Two things:
>>> 1. 488 is Codec negotiation issue, Since the call was already setup with
>>> T38, why would FS wont accept. Can it be due to different FaxMaxbuffer and
>>> Datagram value. Cause that the only difference I see.
>>>
>>> 2nd Sholdn't it fall back to G711 in place of hanging up the call.
>>>
>>> Any insight will be helpful.
>>> Thank you,
>>>
>>> ____________________________________________________________
>>> _____________
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>>
>>
>>
>> --
>>
>> *Brian West*
>> brian at freeswitch.org
>>
>> *Twitter: @FreeSWITCH , @briankwest*
>>
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>>
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>>
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>>
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>>
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>>
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>>
>> *T:*+19184209001 <(918)%20420-9001> | *F:*+19184209002 <(918)%20420-9002>
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>>
>> _________________________________________________________________________
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>>
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>>
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>>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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> http://www.freeswitch.org
>



-- 

*Brian West*
brian at freeswitch.org

*Twitter: @FreeSWITCH , @briankwest*

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