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New Member

7960 Phone Volume Drops Intermittently

We have a user who is saying that her 7960 phone will at times drop the call volume to a level where she has to strain to hear the other caller. This is a new occurence and has not happened in the past. Not sure where to even start looking for this. Using Cisco Infrasturcture running Auto QOS on switches. Have also swapped the phone out and issue still occurs. Any one heard of this before?

5 REPLIES
New Member

Re: 7960 Phone Volume Drops Intermittently

Pls. try this options:

1. swap the cable bet the switch and phone. -maybe a bad cable

2. isolate the phone from the PC if it's plugged into the back of the phone - maybe some apps is causing the issue.

3. swap the phone to other user's phone that has no issue then see if it follows the phone -if the issue followed the phone, then it's a phone hardware issue. the one you swap is also problematic.

4. capture the packets, install a wireshark then set to SPAN the port -this will show whats happening to the packets.

Try each options one after another...

hth

Hall of Fame Super Gold

Re: 7960 Phone Volume Drops Intermittently

Which router and PSTN connection do you have ?

New Member

Re: 7960 Phone Volume Drops Intermittently

We are using Cisco 3825 for Voice Router and have Socket PRI running into that.

Hall of Fame Super Gold

Re: 7960 Phone Volume Drops Intermittently

Please send output of "show controllers T1".

New Member

Re: 7960 Phone Volume Drops Intermittently

This is output of 3825 T1 Controller :

T1 0/0/0 is up.

Applique type is Channelized T1

Cablelength is long 0db

Description: TO SOCKET COMMUNICATIONS

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 (855 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Total Data (last 24 hours)

0 Line Code Violations, 23 Path Code Violations,

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 17 Degraded Mins,

17 Errored Secs, 5 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

T1 0/0/1 is down.

Applique type is Channelized T1

Cablelength is long 0db

Description: NOT USED

Transmitter is sending remote alarm.

Receiver has loss of signal.

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 (859 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 859 Unavail Secs

Total Data (last 24 hours)

0 Line Code Violations, 0 Path Code Violations,

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 86400 Unavail Secs

VOICE_GTWY#

Thanks in advance.....

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