5-3
Administrator’s Guide for Cisco IPVC 3521 BRI Gateway, Cisco IPVC 3526 PRI Gateway, and Cisco IPVC 3540 PRI Gateway
OL-7995-01
Chapter 5 Troubleshooting the Cisco IPVC 3500 Series Gateway
About LED Indications
Note
If the Cisco IPVC 3540 PRI Gateway module is installed in the top slot of the
Cisco IPVC 3544 chassis, resetting the module also resets the chassis and disrupts the
activity of the other cards installed in the chassis.
After the gateway restarts, check the link LED.
•
Perform a ping test from a PC terminal to the gateway IP address. If the gateway is connected to the
network, the ping returns the message “Reply from …”. If the gateway does not respond to the ping,
the ping returns the message “Request timeout.”
If you receive a “Request timeout” message, replace the cable and repeat the ping test. Also, make
sure that you properly configured the gateway IP address and subnet mask, and the router IP address.
Why doesn’t the GK Reg LED light up?
The GK Reg LED indicates that the gateway has an active registration with the gatekeeper.
•
Make sure that you specify the gatekeeper with which you want the gateway to register in the
Gateway interface (see the
“Configuring IP Connectivity Settings” section on page 3-5
for more
information).
•
Make sure that the IP address of the gatekeeper the gateway is to register with is correct.
•
Make sure that the gatekeeper is working.
Why doesn’t the CD LED light up? [PRI Gateways only]
The CD (carrier detect) LED indicates that the PRI port is enabled and that the connection with the
service provider is functioning properly. The LED lights up when all of the gateway’s PRI ports are
enabled and have functioning connections. The LED is off when one port is malfunctioning or the line
is not connected. For Cisco IPVC 3540 PRI Gateway modules, the LED lights up when both Ports have
functioning connections but one is disabled.
•
Make sure you use the correct cable.
•
Make sure that the PRI port is enabled and properly configured.
•
Make sure that the Signaling protocol setting in the PRI Port tab matches the switch type or signaling
protocol the service provider is using (see the
“Configuring PRI Port Physical Interface Settings”
section on page 3-39
for more information).
•
If the gateway is connected to a PBX, make sure that the PBX is properly connected and configured.
•
If the gateway is connected directly to a central office switch, make sure that the PRI line is
configured to support the gateway.
Why is the Alarm LED on?
The Alarm LEDs light up when there is a data transmission error during a call. Errors that trigger the
alarm include: loss of signal; loss of frame; excessive errors; and incorrect configuration.
PRI gateways have an Alarm LED on the front panel and an alarm for each PRI port on the rear panel.
The Alarm LED on the front panel indicates that there is a PRI line error. The Alarm LEDs on the rear
panel are associated with a PRI line and indicate whether the error is from the LAN endpoint (local) or
Public Switched Telephone Network (PSTN) endpoint (remote).
•
Make sure you use the correct cable.
•
Make sure that the LAN cable is connected.
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