PCM on the CPU/C is strictly for audio and fax communication between the CPU/C and voice mail, nothing more, and will not prevent the system from coming online. Without it connected on a running system you'll see when calling the auto attendant it will just give you a slight pop and then pure silence.

If you have a known good serial cable, plug it in to CPC port 1 and connect to a PC at 9600, 8, N, 1. Using HyperTerminal (or equivalent) power up the system. You will see the boot process along with the current IP address.


60% of the time it works every time