Datasheet
Configuring Voice Ports
Troubleshooting Analog and Digital Voice Port Configurations
VC-108
Cisco IOS Voice, Video, and Fax Configuration Guide
Troubleshooting Analog and Digital Voice Port Configurations
The following sections will assist in analyzing and troubleshooting voice port problems:
• Troubleshooting Chart, page 108
• Voice Port Testing Commands, page 110
Troubleshooting Chart
Table 10 lists some problems you might encounter after configuring voice ports and has some suggested
remedies.
Table 10 Troubleshooting Voice Port Configurations
Problem Suggested Action
No connectivity Ping the associated IP address to confirm connectivity. If you
cannot successfully ping your destination, refer to the Cisco IOS
IP Configuration Guide.
No connectivity Enter the show controller t1 or show controller e1 command
with the controller number for the voice port you are
troubleshooting. This will tell you:
• If the controller is up. If it is not, use the no shutdown
command to make it active.
• Whether alarms have been reported.
• What parameter values have been set for the controller
(framing, clock source, line code, cable length). If these
values do not match those of the telephony connection you
are making, reconfigure the controller.
See the “show controller Command Examples” section on
page 103 for output.
No connectivity Enter the show voice port command with the voice port number
that you are troubleshooting, which will tell you:
• If the voice port is up. If it is not, use the no shutdown
command to make it active.
• What parameter values have been set for the voice port,
including default values (these do not appear in the output for
the show running-config command). If these values do not
match those of the telephony connection you are making,
reconfigure the voice port.
See the “show voice port Command Examples” section on
page 99 for sample output.
Telephony device buzzes or does
not ring
Use the show voice port command to confirm that ring frequency
is configured correctly. It must match the connected telephony
equipment and may be country-dependent.