Specifications

42 x900 Series Switch
C613-03092-00 REV D
Warning Only authorised service personnel should install DIMMs. Opening
the switch’s lid may cause personal injury from electric shock and could
damage the switch.
Verifying DIMM
installation
The switch is unlikely to boot unless the DIMM is correctly installed. You will
not be able to issue any diagnostic commands, and will have to rely solely on
LED fault codes.
If the switch does boot but you suspect the DIMM is malfunctioning, display
system information by using the show system command. See “Verifying
installation” on page 37 for output.
The size of SDRAM is in the memory section of the output. If the SDRAM size
is less than the size of DIMM that has been installed, then the switch has not
detected the DIMM. The most likely cause is that the DIMM connector is not
correctly plugged into the slot.
Record the switch’s serial number and revision details for later reference. If you
have questions or problems with the DIMM at any time, contact your
authorised distributor or reseller and supply these serial numbers.
Expansion Options
The following expansion options are available for the AT-9924Ts and x900-24X
switches:
■ SFP ports
■ XFP ports
■ RJ-45 ports
Optional expansion modules make these switches some of the most flexible
units available. They provide economical combinations of speed and port
density. Two 20 Gbps bays in the front of the switch allow quick and easy
installation.
Refer to the Expansion Module Installation Guide for AT-9924Ts and x900-24X
switches for more information about each model. For the latest list of approved
transceiver modules, contact your authorised distributor or reseller.
SFP ports The following SFP modules are approved for use with the AT-8948, x900-48FE,
and AT-9900 switches. They also apply to the AT-A61 expansion module that
the AT-9924Ts supports, and the XEM-12S 1000BASE-X expansion module for
x900-24X switches.
Product No. Media Type Description
AT-SPTX 10/100/1000BASE-T Copper, 100m at 1000Mbps, RJ-45 connector
(except for AT-9924SP)
AT-SPSX 1000BASE-SX 850nm, 2m to 500m with 50/125µm MM fiber,
2m to 275m with 62.5/125µm MM fiber, LC
connector
AT-SPLX10 1000BASE-LX 1310nm, 2m to 10km with 9µm SM fiber,
2m to 550m with 50µm MM fiber, 2m to 550m
with 62.5µm MM fiber, LC connector
AT-SPLX40 1000BASE-LX 1310nm SM fiber up to 40km, LC connector