TIGERJET VoIP Demonstration Board

I'd like to thank the people at Tigerjet for donating a USB FXS interface
board for testing with Asterisk.  We now support their reference design 
board using their Tigerjet 560 Interface chip and the Silicon Labs Si3210 
ProSLIC.  

I'd also like to think Silicon Labs for donating a development board of 
their Si3034 and Tigerjet 320 based winmodem design which we now
support as an FXO

To Configure
------------
Do a "make" and a "make install".  You will need to enable a single channel 
in /etc/zaptel.conf by adding the following line somewhere near the top:

fxoks=1

To create a single channel with FXO Kewlstart signalling.  You may 
substitute "fxols" or "fxogs" for Loopstart and Groundstart signalling
respectively.

Currently known bugs:
---------------------
* Don't even think about unplugging the card while it's in use, or bad 
things will happen.

* If PROSLIC_POWERSAVE is defined, the ability to send audio while on
hook is limited to four seconds after ring is turned off.