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@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_DESTINATION);

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@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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