sundance-communications.com/forum Forums TDM Business Telephone Systems Mitel Telephones & Systems 3300 Change Circuit descriptor to Long

We are having problems with two cordless phones we have on one of our sites, the cordless phones run off of a peripheral cabinet and are located on nursing stations.
Each cordless phone has a parallel socket and switch attached with an auxiliary sounder in the parallel socket. During the day the cordless and the sounder ring, at night the switch is flicked and the sounder no longer rings. We have used this setup on countless sites with numerous phone systems and had no problems.
We replaced a Toshiba system with the 3300 and immediately the staff reported problems with the cordless phones. We substituted the cordless phones but no joy.
The cordless phones ring and can be answered but then the voice reception is barely audible. Socket wiring is fine.
To solve this I have tried to change the circuit descriptors on the two phones in question to Transmission:Long Balance:600 (also Complex), to boost them, but when I try assigning the descriptor to the phones it comes back with invalid circuit descriptor.
I tried changing the circuit descriptor after it had been assigned but it reports back that the circuit is active, tried Busy EX then changing but same result.
Any clues?

Sounds like whatever your auxiliary sounder is, there is a problem with it. If the audio is low day and night, I would suspect that you need to capacitively isolate it. Prove this by connecting ONLY the cordless base to the system, without the switch and sounder.

I would try using an OPS card in the peripheral cabinet, instead of the ONS. The OPS provides a 48vdc circuit, vs the 24vdc in the ONS.