we are facing the following issue with 6 Cisco SPA 962 devices. The phones are registered in a hosted PBX service (based on Vodia PBX). About 1 in 5 calls, whether incoming, outgoing or even between extensions have no audio at all. The phone of the called party rings (so the signaling is OK, even though the caller cannot hear the ringing tone while the phone of the called party is ringing) but when the call is answered, both parties hear nothing.
The problem is caused by the phones, because I replaced one with a yealink device and the yealink worked without issues. I have spent a lots of time so far experimenting with various settings without success.
Has anyone encountered a similar issue? Do you have any ideas or suggestions?
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
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