We've been having an issue lately where one of our sites is reporting echo that is heard only by the person talking on our end. They report hearing their own voice repeated back to them. Being 90% sure that it was only on external calls, we had our PRI tested by TELUS, the provider, who found errors at first (the site is remote and connected to the PSTN over many repeaters), but then did stress testing and said it was fine... He's suggested that it must be on our end, though the fact that he calls it the "analog side" gives me doubts that he knows what he's talking about.
We're running a few different models of phones, though mainly 7941s, 7942s, and 7961s.
CUCM Version 126.96.36.199900
For switches we have a few 3560 8 ports, and mostly 3560 24 ports. The voice gateway is a 3825.
Is there anything that could be causing echo on our end? Nowhere else on this large cluster are we hearing this type of echo.
Thanks guys. The thing is that we're running DSPWare version 9.4.5 and IOS 12.4(13r) and I don't think they're included in the problems. One thing I got, though, is an output from "show controllers t1" (this is after resetting the counters yesterday)
Applique type is Channelized T1
Cablelength is long gain36 0db
No alarms detected.
alarm-trigger is not set
Soaking time: 3, Clearance time: 10
AIS State:Clear LOS State:Clear LOF State:Clear
Version info Firmware: 20071011, FPGA: 13, spm_count = 0
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (30 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
4 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
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
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setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...