Nortel Networks Passport ARN Routers - Manual (Page 90)

Installing and Operating Passport ARN Routers
4-2 114200-E Rev 00
Downloading New Boot and Diagnostic Code
When installating an adapter module as an upgrade to your existing hardware
configuration, you must verify that the ARN contains the minimum required
version of programmable read-only memory (PROM) code for the module you are
installing. BayRS release media includes the latest boot and diagnostic code at the
time it is shipped, but if your upgrade requires newer code, you must manually
download it to the router PROM.
To determine which version of boot and diagnostic code you need when installing
a particular adapter module, see see the module-specific Supplement that ships
with the module, and to the Document Change Notice or the Release Notes
distributed with your BayRS release. For instructions on how to upgrade the
PROM code in flash memory, refer to the Upgrading Routers guide.
Powering Down
Before installing a WAN adapter module:
1. Turn off the ARN.
Set the power switch to 0, off (refer to Figure 1-25 on page 1-30).
2. If present, turn off or disconnect the redundant power supply.
3. Attach an antistatic wrist strap.
You receive an antistatic wrist strap with the adapter module. See the
instructions included with the wrist strap.
The wrist strap directs static electricity from your body to the router chassis,
preventing discharge to sensitive electronic components.
Warning: You cannot hot-swap ARN WAN adapter modules.
Caution: Electrostatic discharge can damage hardware. You must wear the
antistatic wrist strap whenever you handle printed circuit boards.