Nortel 1100 安装指导

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Chapter 9  Nortel VPN Router 5000 option installation  145
Nortel VPN Router Installation — Hardware Options 
Preparing to install hardware options
This section describes preliminary steps for installing or replacing field 
replaceable units in the VPN Router 5000.
Option cards, DIMMs, and fan trays
To install an option card, pair of DIMMs, or fan tray, you must first follow these 
steps:
1
Shut down the VPN Router 5000.
2
Unplug the VPN Router 5000.
3
Remove the front bezel from the chassis.
4
Remove the chassis from the equipment rack.
5
Remove the top cover from the chassis.
If you need to add or replace an option card, pair of DIMMs, or fan tray, see 
.
Power supplies
The VPN Router 5000 power supplies are hot-swappable. You do not need to shut 
down the system to replace a power supply. For instructions, see 
Hard disk drives
The backup hard disk drive is hot-swappable, but the primary disk drive is not.
To replace either hard disk drive, you must remove the front bezel.
To replace the primary hard disk drive, you must first shut down the gateway.
For complete information about replacing a hard disk drive, see 
.