Currently when we place a call out to the pstn the users on the digital or analog phones at the other end are claiming they experience periodic echo. What would be some possible ways of troubleshooting and resolving this echo .
It seems odd the high number of echo issues with CallManager (compared to a digital PBX). While several will post the CCO Url on echo, I am beginning to wonder if the Cisco solution needs better echo correction (above 32ms), or if the loads/phones need some echo correction as well. This is a common posting on NPC.
Hopefully they have increased the aggressiveness of the acoustic echo cancellation, however, there still may be echo for PSTN callers.
Two common problems are; Volume too high on the IP Phone and Headset volume too high.
Also, the echo cancellation on the Cisco gateways cancels echo reflections from the PSTN. So, when the IP Phone user speaks, the echo reflected from the PSTN users phone is canceled by the gateway. The gateway does not cancel a PSTN callers echo generated at the IP Phone.
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...