[asterisk-dev] Proposal for T.38 transparent gateway design in Asterisk

[marek cervenka]

> And there are really lots of users which use Asterisk with IAXmodem and
> it works. Thus, it would be a pitty if TDM<->IAX works but T.38<->IAX not.
>
> Of course it will not work if you try to use FoVoIP over networks with
> higher delay/jitter. But if you increase delay even more then also T.38
> will fail. That would be something like "we do not implement T.38
> because it does not work over satellite links".
>
>>> Also
>>>     SIP-ATA 1<---SIP+T.38--->Asterisk<---SIP+G711---->  SIP-ATA 2
>>> is a valid scenario and should be supported. In this case Asterisk
>>> should reINVITE to G711 if the T.38 reINVITE was rejected by SIP-ATA 2.
>>
>> I would say this should *not* be supported; if someone has a FAX machine
>> attached to a SIP ATA, and that ATA does not support T.38, then they
>> should get one that does. Even if we did support this scenario (assuming
>
> There are lots of installed gateways (e.g. Asterisk < 1.8 servers) which
> do not support T.38 gatewaying but wont be replaced because of this.
> Gateways are often connected to other equipment via good networks (LAN).
> Thus in such cases it would work reliable.
>
> So please, just implement the T.38 gatewaying so that it may work will
> all channels - do not limit the gatewaying object itself to TDM channels
> only.

+1 (probably +1000 and more)

---------------------------------------
Marek Cervenka
=======================================