[Asterisk-Users] Fax over IP doesn't works

[Darren Sessions]

We used spandsp on the voip side. Our inbound vendor sets the call up 
G711 and spandsp answers. It's a bit slow as it seems to only negotiate 
v29 terbo, but it works.

Finding the correct version of libtiff was a pain. One sub version off, 
and it wouldn't work. Wasn't so much that it was a hard to get it to 
work, just a lot of tweaking to get it to work. Tedious.




On Oct 19, 2004, at 12:50 PM, Steve Underwood wrote:

> So what changes with T.38? You still need spandsp to interwork with 
> the PSTN. What was so hard about getting spandsp to work? (I'm 
> genuinely interested)
>
> Regards,
> Steve
>
> Darren Sessions wrote:
>
>> Someone should put a bounty on T38. We're using spandsp right now and 
>> have had success - but it was an absolute pain to get it to work.
>>
>> On Oct 19, 2004, at 12:38 PM, Steve Underwood wrote:
>>
>>> Michael Loftis wrote:
>>>
>>>> Just my $0.02 but seems to me the VoIP community as a whole needs 
>>>> to extend SIP (or IAX?) with a special 'fax data' mode wherein the 
>>>> gateways either act locally as the modem and queue/push bits (not 
>>>> audio data) for the remote end or transparently bridge them through 
>>>> in the case of a passthrough call.
>>>>
>>>> IMO faxes need to die, but business still loves them.
>>>>
>>>> As I said, just my $0.02.
>>>
>>>
>>> That is such a good idea they did it several years ago. Its called 
>>> T.38 for H.323 and SIP. IAX doesn't yet have something similar, but 
>>> its high on the list of things to do.
>>>
>>> Regards,
>>> Steve
>>>
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