Cisco CP-7942G Administration Guide - Page 164
General Troubleshooting Tips for the Cisco Unified IP Phone Expansion Module
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General Troubleshooting Tips for the Cisco Unified IP Phone Expansion Module Chapter 9 Troubleshooting and Maintenance Table 9-2 Cisco Unified IP Phone Troubleshooting (continued) Summary Phone call cannot be established Call established with the iLBC protocol does not show that the iLBC codec is being used Explanation The phone does not have a DHCP IP address, is unable to register to Cisco Unified Communications Manager, and shows a Configuring IP or Registering message. Verify the following: 1. The Ethernet cable is attached. 2. The Cisco CallManager service is running on the Cisco Unified Communications Manager server. 3. Both phones are registered to the same Cisco Unified Communications Manager. 4. Audio server debug and capture logs are enabled for both phones. If needed, enable Java debug. Call statistics display does not show iLBC as the receiver/sender codec. 1. Check the following by using Cisco Unified Communications Manager Administration: - 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. General Troubleshooting Tips for the Cisco Unified IP Phone Expansion Module Table 9-3 provides general troubleshooting information for the Cisco Unified IP Phone Expansion Module 7914. Table 9-3 Cisco Unified IP Phone Expansion Module 7914 Troubleshooting Problem Solution No display on the Cisco Unified IP Phone Verify that all of the cable connections are correct. Expansion Module. Verify that you have power to the Cisco Unified IP Phone Expansion Module 9-12 Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 7.0 OL-15483-01