Hal gave me a link to Valcom. I suppose this is the
unit made by Harris for Lucent in which Valcom now fixes.
I had somewhat the same problem but was unable to fix it on the bench.
If the squirrels, chipmunks and rats are hungry they may chew on the wire.
No sign of varmints?
One thing I'll never forget.
I Did a service call for a small bakery and went into the suspended ceiling and most of the station wire was chewed on down to the copper.
They had phone problems and heath department issues.
