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Chapter 4 Troubleshooting the Cisco Unified IP Conference Station 7936
Other Troubleshooting Information
4-4
Cisco Unified IP Conference Station 7936 Administration Guide
OL-10751-01
Table 4-1 Troubleshooting Information
Problem Description Resolution
LCD screen message display If the message “Obtaining IP Address” is
persistent in the LCD screen display, check the
DHCP server and check the network connections.
If the message “Cannot contact TFTP Server” is
persistent in the LCD screen display, check to
make sure that the TFTP Server is up and running.
Poor voice quality when calling digital cell
phones using the G.729 codec
Caution Using a cell, mobile, or GSM phone, or
two-way radio in close proximity to a
Cisco Unified IP Phone might cause
interference. For more information,
refer to the manufacturer's
documentation of the interfering
device.
In Cisco Unified CallManager, you can configure
the network to use the G.729 codec (G.711 is the
default). When the G.729 codec is used, calls
between the Cisco Unified IP Conference Station
and a digital cellular phone will have poor voice
quality. Use the G.729 codec only when
necessary.
For more information, refer to the Cisco Unified
CallManager application online help.
No dial tone Check that all connections are secure and in place.
Make sure all connections are correct.
Cisco Unified IP Conference Station does not
ring
Check that the ringer setting is not “Ringer Off.”
Check the volume level.
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