Cisco CP-7911G Administration Guide - Page 241
the Cisco Unified Communications, Unified Communications Manager
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Chapter 9 Troubleshooting and Maintenance General Troubleshooting Tips Table 9-2 Cisco Unified IP Phone Troubleshooting (continued) Summary Call established with the iLBC protocol does not show that the iLBC codec is being used Explanation Call statistics display does not show iLBC as the receiver/sender codec. 1. Check the following using the Cisco Unified Communications Manager administration pages: - Both phones are in the iLBC device pool. - The iLBC device pool is configured with the iLBC region. - The iLBC region is configured with the iLBC codec. 2. Capture a sniffer trace between the phone and Cisco Unified Communications Manager and verify that SCCP messages, OpenReceiveChannel, and StationMediaTransmit messages have media payload type value equal to 86. If so, the problem is with the phone; otherwise the problem is with the Cisco Unified Communications Manager configuration. 3. Enable audio server debug and capture logs from both phones. If needed, enable Java debug. OL11954-01 Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0 9-21