I have a client who owns a DX-80 with 6 Digital Executive handsets and 3 incoming CO’s. Recently they physically moved. The new office has completely new wiring. The phones seem to work fine, with two exceptions:
1) CO’s 1 & 2 ring properly at all desks. CO 3 causes the appropriate LED to flicker to indicate an incoming call, but produces no audible ring.
2) The power switch LED on the DX-80 itself is flashing slowly. They claim this never happened before, but I am not certain.

My part of this install was supposed to be just the wiring, but it has gone beyond that now. Wiring was done using 4 pair CAT 3 compliant cable to TSB-568A standards. I have to assume there is no wiring problem since the phones seem to work (except for the above), and they only use the “blue” pair which is the same in 568A and 568B.

Any advice would be appreciated.