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7960/7940 Serial Port technical information

I need to locate technical information for the serial port of 7960/7940 etc phones.

I need the pinout, baud rate, bits, parity etc and the command set that is used to communicate to the phone to enable dialing capability i.e. such as a 7914 expansion module can. This solution will enable school districts in this area to seriously consider a Cisco solution. I have very short period of time to come up with this solution.

If you have any information in regards to this need or any questions please pass it on to me as soon as you could.

Thanks - Carl