When I try to hear a message from my voice mail working fine if I push "messages" softkey of my 7911 ip phone but it doesn't work with handset, It is like the DTMF are not sending or voice mail not understanding this DTMF tones.
It is as if the voice mail did not understand the DTMF.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...