welcome to the Polycom Community.
There is no possibility for an end customer to flash a different firmware and in my experience there are no software issues that would cause a dropped call.
Have you checked all your connectors are correct and working ? Does the phone drop the line itself completely ?
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
Many thanks for your response and Welcome!
In answer to your questions:
As I mentioned in original post, this unit is being used on a residential line. What I neglected to say was that I have a (Gigaset) DECT base-station/phone system (& previously a BT DECT base-station) plugged into another extension socket. Using that system, my wife regularly makes calls to her sister lasting upwards of 35 minutes, but the calls have never dropped using the Gigaset or BT units. This only happens on the Polycom unit.
It's also true that while I am using the Polycom unit in my office, the calls are not cut off by someone else in the house trying to access the line.
Should I assume from these additional observations that the Polycom is incompatible with residential lines that have other (DECT) phone systems connected?
I have also re-checked the settings in: Admin setup>Phone System>Caller ID which is set to British Telecom, although I understand that the CLID settings should have no effect on cutting off a call. If nothing else, it confirms that the phone is compatible with BT!
Many thanks for any further advice.
I just noticed this thread.
I am having exactly same issue -- line dropping during a call.
If I dial and the call drops I have to dial again the call has dropped and cannot be resumed on another handset. If someone phones me and the sound drops out, I "replace" the receiver and pick up and resume.