Cisco 7935 Administration Guide - Page 87

Other Troubleshooting

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Chapter 4 Troubleshooting the Cisco IP Conference Station 7935 Other Troubleshooting Step 7 Step 8 Step 9 Use the dialing pad to enter the IP address of the device you want to ping. Press the . softkey to enter periods (.) and press the < softkey to correct mistakes. Press the Execute softkey. A reply message similar to the following should display: Reply from 0.0.0.0 Press the Menu button to go back to the Diagnostics menu, or press the Exit button to return to the resting display. Other Troubleshooting The following table provides some information for troubleshooting possible problems with the IP Conference Station. Problem Description LCD screen message display Poor voice quality when calling digital cell phones using the G.729 codec No dial tone Resolution 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. In Cisco 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 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 CallManager application online help. Check that all connections are secure and in place. Make sure all connections are correct. 78-12727-03 Cisco IP Conference Station 7935 Administration Guide 4-3

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4-3
Cisco IP Conference Station 7935 Administration Guide
78-12727-03
Chapter 4
Troubleshooting the Cisco IP Conference Station 7935
Other Troubleshooting
Step 7
Use the dialing pad to enter the IP address of the device you want to ping.
Press the
.
softkey to enter periods (.) and press the
<
softkey to correct mistakes.
Step 8
Press the
Execute
softkey.
A reply message similar to the following should display:
Reply from 0.0.0.0
Step 9
Press the
Menu
button to go back to the Diagnostics menu, or press the
Exit
button to return to the resting display.
Other Troubleshooting
The following table provides some information for troubleshooting possible
problems with the IP Conference Station.
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
In Cisco 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 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 CallManager application online help.
No dial tone
Check that all connections are secure and in place.
Make sure all connections are correct.