11-25-2010 12:53 PM - edited 03-16-2019 02:07 AM
Just done a new deployment with CUCM 7.1(5), 2921 H323 gateway and T1 PRI line. The overall call quality is good. However, we received few complaints about external calls recently. When both people speak at same time, it cuts audio out to both ends, like half-duplex communication. It can be reproduced with a certian number.
We monitor the call QoS statistic data during the call as follows:
Rcvr Codec: G.711u
Sender Codec: G.711u
Rcvr Size: 20ms
Sender Size: 20ms
Rcvr Packets: ~3000
Sender Packets: ~3000
Avg Jitter: 1
Max Jitter: 32
Rcvr Discarded: 1
Rcvr Lost Packets: 0
MOS LQK: 4.5
Avg MOS LQK: 4.477
Min MOS LQK: 4.38
Max MOS LQK: 4.5
MOS LQK Version: .95
Cumulative Conceal Ratio: .0007
Interval Conceal Ratio:0
Max Conceal Ratio: 0.0199
Conceal Secs: 5
Severely Conceal Secs:0
Latency:0
Network Protocol: IPv4
I don't see problem with the data above.
Anybody has the similar experience? Where can I start the troubleshooting?
Thanks.
Michael
11-25-2010 06:21 PM
Does this happen only when using speakerphone? I've see this before where a newer phone firmware resolves it. Although you are on 7.1(5) which is pretty new already.
03-18-2011 10:01 AM
Hi Michael,
Were you able to resolve this problem. We experiencing the same condition with v7.1(5)
In any input is much appreciated.
Thanks.
03-18-2011 10:22 AM
It was partly resolved by IOS and phone load upgrades.
Are you using PRI line? If so, make sure it's error free.
Can you please post your IOS version, DSP version and phone load version?
Michael
03-18-2011 10:32 AM
Thanks Michael.
1. Series 2901 - Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
2. Its PRI with MGCP - Both of the two Controllers appear error free.
3. DSPware version: 26.3.4
4. Phone load SCCP42.9-0-3S
5. The problem exists only on external calls.
T1 0/0/0 is up.
Applique type is Channelized T1
Cablelength is long 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: 20090408, 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 (412 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, 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
T1 0/0/1 is up.
Applique type is Channelized T1
Cablelength is long 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: 20090408, 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 (414 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, 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
03-18-2011 10:41 AM
You have the exact same versions as we had before the upgrade.
We had a TAC case for this, based on the TAC's suggestion -- upgrade the IOS to 15.0(1)M4 or later (DSP will be upgraded with IOS), upgrade the phone load to 9-1-1.
Hope this helps.
03-18-2011 10:51 AM
Thanks Michael. We will upgrade the firmware and IOS.
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