I'm working with a Cisco UC520 system. The phones are mostly 7961 and 7961GE. My problem is that a few of them have the headsets not always working. However, the speakerphones works fine.
They previously worked without incident. All that was done was to change the associated extensions. Originally 3 had this issue. One phone suddenly started working out of the blue. I know these phones are known to have hardware issues, but is there anything that can be checked from a settings or configuration aspect?
i.e. an of the shelf longer phone wire was used to connect the handle to the phone and they had issues, they could hear what was being said, but the other side could not hear them.
Working/notworking only one side can hear, or neither can hear.
If not mistaken, there is a special function button on these phones to activate the headset unless it is connected through the handle.