Replacing SIMMs
I-2
893-743-A
Preparation
Before you begin installing the SIMMs, make sure you have the necessary tools
and equipment. Follow the instructions under “Preparatory Steps” to prepare
the hub for the installation procedure.
Tools and Equipment
You will need the following tools and equipment during the installation
procedure:
■
A #2 Phillips screwdriver for removing the rack-mounting screws if the
hub is rack mounted
■
A screwdriver for loosening the wall-mounting screws if the hub is wall
mounted
■
A #1 Phillips screwdriver for removing the hub cover
■
An antistatic mat and wrist strap (attached to an antistatic leash)
Preparatory Steps
If you are upgrading the memory in a hub that has been in operation, you
should take the necessary precautions to ensure that users’ sessions are not
disrupted and that appropriate safety measures have been followed. Before
beginning the upgrade, follow these steps:
1.
Instruct network users to save their work and log out of active session
applications.
2.
Turn off the power to the concentrator.
3.
Disconnect the power cord, first from the wall outlet and then from
the hub.
4.
If the hub is installed in a rack or on a wall, remove the hub from its
installed location.
a. For a rack-mounted hub, remove the screws that secure the hub to the
equipment rack and slide the hub out of the rack.
b. For a wall-mounted hub, loosen the screws that support the wall mount
brackets, and lift the hub and attached brackets off the screws.
5.
Set the hub on a level work surface.