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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