I got a report from one of our agent and she had experience a ghost call. per her description, her phone ring and on the phone displays the number of the caller but she hears nothing upon lifting the handset. Sounds a one way audio, my questions are how can i determine if it is a ghost call? how will I troubleshoot and fix it?
Can someone provide me a documentation about ghost/phantom call.
Just per-chance, you aren't sharing a MGCP controlled FXS port with an extension also assigned to SCCP endpoints (like IP phones), are you? There are known limitations that cause 'ghost ringing' scenarios when you do this, and a phone will ring after a call is hung up, with nothing attached on the other side.
Otherwise, troubleshoot this like you would any intermittent 1-way or no-way audio issue.
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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 ...