I am in the early stages of troubleshooting users reporting static on the phones when they are on a call. Based on others with the same issues what would be the best place to look for an issue that may cause this. In other words when this happens what is the main reason or reasons for static?
The users are connected to a Catalyst 4506-E switch which then goes into a 2821 router and comes back to a central location via T-1 MPLS. This is the way most all our offices are setup, we are Hub and Spoke. Not all users are having this issue. They are all Cisco IP Phones (7965).
2821#show controllers t1
T1 0/2/0 is up.
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: 20071129, FPGA: 20, 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 (368 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
58 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
58 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
13708 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
13708 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
network-clock-participate wic 2
network-clock-select 1 t1 0/2/0
Let us know if that fixes the issue, else more questions coming.
No adverse effects, we're not here to make you suffer. That will eliminate the slip errors that you can see in show controllers. Who initially configured in the router was not a professional.
Thankfully I did not configure...Still learning the VoIP configs...
I will put this in place I just need to run it by the powers in place.. :-)
Thanks for your help.