Cisco 7911G - IP Phone VoIP User Manual

9-21
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
OL11954-01
Chapter 9 Troubleshooting and Maintenance
General Troubleshooting Tips
Call established with the iLBC
protocol does not show that the
iLBC codec is being used
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.
Table 9-2 Cisco Unified IP Phone Troubleshooting (continued)
Summary Explanation

Cisco 7911G - IP Phone VoIP Specifications

General

Brand	Cisco
Model	7911G - IP Phone VoIP
Category	IP Phone
Language	English