Cisco AS5800 Specifications Page 199

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5-21
Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide
DOC-7810814=
Chapter 5 Maintenance
Replacement Procedures
Verifying and Troubleshooting the Installation
Verify that your new DSC card is properly installed and operative by observing the card LEDs as
follows:
Verify that the power LED and MBus LED light after the DSC card has been installed in the dial
shelf and the system is powered on.
If both the MBus and power LEDs are on, the card should boot normally. During the boot
sequence, the four alarm LEDs momentarily flash and then turn off. In addition, the two
four-character alphanumeric displays will show status messages.
After the boot sequence completes, the alphanumeric display should read:
MSTR
If the boot sequence does not complete, contact a service representative for assistance.
If either the power or MBus LED remains off, try removing and reinserting the card. If the
problem persists, contact your service representative. You may need to replace the card.
If the problem persists with a new card installed, remove the dial-shelf controller card from the
dial-shelf slot and examine the backplane for bent connector pins.
To inspect the backplane pins, first power OFF the system to avoid hazards caused by high
voltages present on the backplane connectors. Next, remove cards in neighboring slots to allow
an unimpeded view of the backplane connectors. Then, using a flashlight, verify that the
backplane connectors are in good condition. If you discover bent pins, you need a new
backplane. The backplane is an FRU. Contact your service representative to order a new
backplane, and see the Replacing the Backplane Module section on page 5-32.
You can also use the show command to diagnose a problem with the dial-shelf controller card. Enter
the following command:
5800> enable
enter password <password>
5800# show diag <type {shelf | slot}>
Ctrl-Z
Configuring the Dial-Shelf Controller Card
The Cisco 5814 dial shelf is designed to recognize DSC cards in specific slots within the dial-shelf
chassis. Backplane slots 12 and 13 are the designated DSC card slots. This design supports redundancy
features to eliminate dropped calls.
Caution Do not configure the Ethernet interface on the DSC to be available on the network.
Users could connect to the system via Telnet (VTY line) without using a password. System
security could be seriously compromised if unauthorized users were to gain access to the
Ethernet interface on the DSC in this way.
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