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Cisco AS5350 Universal Gateway Chassis Installation Guide
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Appendix
Replacing the Boot ROM
Replacing the Boot ROM
To upgrade the boot ROM software to a new software image, you must replace the existing boot ROM.
Required Tools and Equipment
You will need the following tools and equipment:
•
ROM extraction tool
•
One boot ROM
•
ESD-preventive wrist strap
Boot ROM Replacement
Caution
A PLCC-type boot ROM does not have pins that plug into the socket; instead, the contacts are on the
sides of the boot ROM and along the inner sides of the socket. Therefore, you cannot use a small
flat-blade screwdriver to remove a PLCC-type boot ROM. Forcing a small screwdriver or other tool
between the boot ROM and the sides of the socket to pry out the boot ROM will damage the component,
the socket, or both.
To replace the boot ROM, follow these steps:
Step 1
Turn the power switch on the universal gateway off and disconnect site power.
Warning
Before opening the chassis, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. To see translations of the warnings that appear in this publication, refer
to the
Regulatory Compliance and Safety Information
document that accompanied this device.
Step 2
Remove all interface cables from the rear panel of the universal gateway.
Step 3
Attach an ESD-preventive wrist strap.
Step 4
Remove the chassis cover. (See the instructions in the section “Removing the Chassis Cover” section on
page A1.)
Step 5
Remove the carrier card to access the system board. (See the Cisco AS5350 Universal Gateway Card
Installation Guide for instructions on removing the carrier card. This document is available on
Cisco.com and the documentation CD-ROM that comes with your universal gateway. See the “Obtaining
Documentation” section on page xiii.)
