Installing A Flash Simm - Allied Telesis AR Series Hardware Reference Manual

Hardware Reference
C613-03031-01 REV C

Installing a FLASH SIMM

Early models of AT-AR720 routers can be upgraded from the factory default
4MB of FLASH memory to 8MB of FLASH memory by installing a 4MB
80-way Single Inline Memory Module (SIMM) stick.
SIMMs should only be installed by authorised service personnel. Unauthorised
opening of the router lid may cause danger of injury from electric shock, damage
to the router, and invalidation of the product warranty.
Before installing a FLASH SIMM:
1. Check that you have the correct tools and equipment.
You will need a medium-sized posidrive screwdriver.
2. Avoid injury by working in a safe environment.
The work space should be free of hazards, and there should be sufficient
room to lay out the router, the FLASH SIMM stick, and the tools.
3. Unpack the FLASH SIMM stick in an antistatic environment.
FLASH memory, like most electronic devices, is highly sensitive to electrostatic
damage. This can be particularly acute in the dry atmosphere of computer
rooms and offices. Before commencing work, ensure that you have an approved
antistatic wrist strap connected to an earthing point. Wear the strap at all
times during this procedure. Failure to follow the correct antistatic procedures
may result in damage to the router or the FLASH SIMM stick. If you have any
queries about antistatic procedures, contact your authorised Allied Telesyn
distributor or reseller.
To install a FLASH SIMM:
1. Turn off the router and remove the mains and, if connected, RPS power cord.
Do not take risks with mains electricity. Although the router is fully shielded
internally, the power should always be removed to reduce the risk of electrical
shock. Always disconnect the power cord and, if connected, the RPS power cord
before attempting to remove the lid of the router.
2. Remove the router lid.
The router lid is secured by posidrive screws. Remove the screws and lift
the lid off the chassis.
The router may need to be removed from any racking system before the lid
can be removed.
3. Insert the new SIMM.
The SIMM stick is polarised by a notch located at one end of the stick and a
half circular notch located in the middle of the stick. When the stick is
installed correctly its socket, the half circular notch will align with a bulge
in the socket.
Insert the new stick into the SIMM socket at an angle of about 60 degrees,
ensuring it is inserted fully into the socket along its entire length. Rotate
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