[Asterisk-Users] Virtual Modems

[Chris Parker]

I think for now you are stuck with modem pass through. Our company does
a lot of Fax over IP applications and T.38 is used exclusively for
faxing.

There has been some work on modem relay but it is still in the white
paper stage at this point. There is an ITU protocol V.150 designed for
modem relay over IP but I have yet to see any devices out there that
support it.

Here's a good albeit dated article on the topic:

http://www.commsdesign.com/design_corner/OEG20030312S0017



-----Original Message-----
From: Nathan Goodwin [mailto:ngoodwin at datatech-cs.com] 
Sent: Tuesday, December 14, 2004 10:57 AM
To: Asterisk-Users at lists.digium.com
Subject: [Asterisk-Users] Virtual Modems

After searching the archives, I came acrross a few people mentioning 
this, but I never saw anything about what became of it.

Has anyone tried to make a virtual modem that could be directly handled 
by astrisk, I saw a while ago that someone was going to try and make one

using the same DSP libaries that the WinModems use, but then nothing.

Would do this even be possible, and if so, what kind of connection 
speeds could one hope to achive, with the compression and such?

I don't need a 56k connect (though it would be nice), but be able todo 
28.8 would be fine. :)

Also, would using the new T.38 (I think it is), that was designed for 
faxes help modem calls any?
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