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Cisco AS5350 Universal Gateway Chassis Installation Guide
78-10754-03 0A
Appendix
Removing the Chassis Cover
NVRAM in the universal gateway uses an internal lithium battery to maintain data. Although this is not
a field-serviceable component, we are required to provide the following safety warnings:
Warning
Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information document that accompanied this device.
Warning
There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with
the same or equivalent type recommended by the manufacturer. Dispose of used batteries according
to the manufacturer’s instructions. To see translations of the warnings that appear in this publication,
refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings,
necklaces, and watches). Metal objects will heat up when connected to power and ground and can
cause serious burns or weld the metal object to the terminals. To see translations of the warnings that
appear in this publication, refer to the Regulatory Compliance and Safety Information document that
accompanied this device.
Chassis Cover Removal
You must open the universal gateway chassis to gain access to its interior components: boot read-only
memory (ROM) software, synchronous dynamic random-access memory, dual in-line memory (SDRAM
DIMMs) modules, and Flash memory SIMMs. (When you replace the boot ROM, you must also remove
all feature cards in the chassis.)
To remove the chassis cover, follow this procedure:
Step 1 Turn the power switch on the universal gateway off and disconnect site power.
Step 2 Remove all interface cables from the rear panel of the universal gateway.
Step 3 Place the gateway so that the front panel is facing you.