On Polycom phones, when someone leaves a voice mail, users are notified by three different ways.
These settings are ok if the phone is used in an enclosed office space. But in an open office space, where there are number of Polycom phones, these beeps annoy everyone in the office. There is no easy way to turn off the beeps from the UI. You need to make the following change to the sip.cfg file and re-upload it to the phones.
Search for the following text in sip.cfg
and replace it with
Upload the new sip.cfg file and reboot the phone. There would be no more annoying beeps.
-VOIP Connections Support team