Go to the patch panel, and the KSU (the telephone control unit) and remove and re-insert each patch cord several times. Do one at a time, so as not to confuse things.

The weakest link in any modern communications system is the plugs on the ends of the patch cords or phone cords.

By removing/inserting, you wipe any corrosion off the contacts that has built up.


Arthur P. Bloom
"30 years of faithful service...15 years on hold"