[OpenSIPS-Users] Forcing reinvite for t38 on different pstn gw

[Uwe Kastens]

Hi,

>> Is it possible to handle reinvites in that way, that I can send them to
>> a special pstn gw? This looks a little tricky, since I need to drop the
>> 1st invite.
> 
> No, that would not be in the slightest bit compatible with SIP protocol
> mechanics as described per the RFC.  The initial INVITE establishes the
> dialog, and without that initial request there cannot be sequential
> in-dialog requests - and therefore, no re-INVITEs.
> 
[...]
> 
> 
> The only way you can pull this off is to decide in advance whether the
> call needs to go through a special PSTN GW when routing the initial INVITE.

Ok, thats not possible with T38, since the codec is 1st established as
"normale" codec. If one of the devices gets a fax ton it will iniitate a
reinvite with t38.


Thanks

BR

Uwe


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