Cisco 7935 - IP Conference Station VoIP Phone Administration Manual page 88

Other Troubleshooting
Problem Description
IP Conference Station does not ring
IP Conference Station resetting
No LCD screen display
LCD screen display issues
DTMF delay
Cisco IP Conference Station 7935 Administration Guide
4-4
Chapter 4 Troubleshooting the Cisco IP Conference Station 7935
Resolution
Check that the ringer setting is not "Ringer Off."
Check the volume level.
• The IP Conference Station resets when it
loses contact with the Cisco CallManager
software.
The following status message appears in the
LCD screen if the IP Conference Station loses
contact with the Cisco CallManager software:
Registering
The IP Conference Station resets when it
•
loses contact with the network.
The following status message appears in the
LCD screen if the IP Conference Station loses
contact with the network
Configuring IP
These lost connections can be due to any
network connectivity disruption, including
cable breaks, switch outages, and switch
reboots.
Check to make sure that the
IP Conference Station has power.
Make sure that the power supply unit is plugged
in.
You might see beat frequencies (scan lines) in the
LCD screen if you are using certain types of older
fluorescent lights in your building. Moving the
IP Conference Station away from the lights, or
replacing the lights, should resolve the problem.
When you are on a call that requires keypad input,
if you press the keys too quickly, some of them
might not be recognized.
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