Specifications

34 AT-9900 Series Switch
C613-03084-00 REV A
Approved DIMM for the AT9924T/4SP switch
For an AT-9924T/4SP switch without an AT-ACC01 network processor
accelerator card installed, the following DIMM have been approved for use:
■ AT-SD256A-00 256MB SDRAM (installed at factory)
■ AT-SD512A-00 512MB SDRAM (upgrade)
For an AT-9924T/4SP switch with an AT-ACC01 network processor accelerator
card installed, the following DIMM is required:
■ AT-SD512A-00 512MB SDRAM (installed at the factory if the switch is
ordered with an AT-ACC01 fitted)
How to check if DIMM is installed correctly
The switch is unlikely to boot unless the DIMM is correctly installed. If the
switch does boot but you suspect the DIMM is malfunctioning, enter the
command:
show system
to display system information. An example output is shown in Figure 1-10 on
page 27.
In the memory section of the output there should be an entry that shows the
size of DRAM. If the DRAM size is less than the size of DIMM that has been
installed, then the switch has not correctly detected the DIMM. The most likely
cause is that the DIMM connector is not plugged into its slot correctly.
Contact your authorised distributor or reseller if the correct details are not
displayed in the output of the show system command.
Record the switch’s serial number and revision details for future reference. If
you have any difficulty with the DIMM at any time, contact your authorised
distributor or reseller and quote the serial number of the base card on the
switch.
Lithium Battery
Warning Only authorised service personnel should change the lithium battery.
Unauthorised opening of the switch’s lid may cause danger of injury from
electric shock, cause damage to the switch, and will invalidate the product
warranty.
There is a danger of explosion if the lithium battery incorrectly replaced