asterisk users - Apr 2003 - Voicetronix driver for V6PCI/V12PCI - first draft

Good people,

  Please find attached a first shot at a driver for the Voicetronix  
OpenSwitch hardware. It does work (ish).  After paying $900-odd for it 
I figured I might try to make it work with Asterisk (could never get 
enough documentation on Bayonne!)

  I have problems with the audio quality, and since am new to Asterisk, 
I could really do with some input. First is that because the 
voicetronix api does not provide a nice way for one to emulate a file 
descriptor per channel (for asterisk to monitor for exceptions and 
data-ready), I had to use the monitor thread to generate data-ready on 
a pipe to force asterisk to keep trying to read from the channels if I 
wanted any audio recording.  In addition, I can't figure out a way to 
generate exceptions for asterisk, in order to pass hangup and such.

Any changes, additions, help would be very welcome. I think it would be 
a great addition to Asterisk.

Cheers
P.

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