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Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
78-10453-04
Chapter 7 Troubleshooting the Cisco IP Phone
Obtaining Status, Model, and Version Information
Troubleshooting Tips
• The RxType/TxType indicates which codec is being used for the call between
this phone and the other device. If they do not match, verify that the other
device supports the codec conversation or that a transcoder is in place to
support the service.
• The size of the sound samples (RxSize/TxSize) should match on both
devices.
• If you are experiencing gaps in your voice calls, check the AvgJtr and MaxJtr
values. A large variance between the two values might indicate a problem
with jitter on the network or periodic high rate of network activity.
For additional information, see the Using the 79xx Status Information For
Troubleshooting tech note available from Cisco.com:
http://www.cisco.com/warp/customer/788/AVVID/telecaster_trouble.html
Viewing Status Messages
Use the status messages to diagnose network configuration problems. You can
access these messages at any point, even if the phone has not completed its startup
process.
Cisco IP Phone 7960/7940
Procedure
Step 1 Press settings.
Step 2 Use the Navigation button to select Status.
Step 3 Press the Select soft key.
Step 4 Select Status Messages.
Step 5 Press the Select soft key.
Step 6 The status messages screen might display any of the messages described in
Table 7-1.