If the issue is specific to this phone, it's likely a firmware bug. What firmware are you running on this phone? Have you tried installing the latest firmware for the phone? I know there were some echo issues for this phone around 3-3-12.
Is the issue only seen on PSTN calls, or do you see it for internal calls to other IP phones when this phone is involved?
And out of curosity, is the issue only seen in a conference room with a lot of glass surfaces? It sounds like it may be an environmental issue, caused by acoustic echo. IP to IP calls only have th opportunity for echo at the endpoint itself (at mic & speaker), unlike PSTN calls where you can get echo at hybrid loops.
It may be worthwhile to try it in a room that is large or isn't prone to high amounts of acoustic echo, to see if that's the culprit. Either way, we may be able to tweak the phone's ECAN firmware in the DSP to accomodate this environment.
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 ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...