Specifications
Table Of Contents
- AT-8900 Series Hardware Reference
- Contents
- Models Covered By This Reference
- Why You Should Read This Reference
- Where To Find More Information
- Hardware Description
- Online Documentation
- AT-TFTP Server
- Using Windows Terminal and Windows Hyperterminal
- Switch Start-up
- RS-232 Terminal Port (ASYN0)
- Useful Cables
- Test Facility
- Power Supply Units (PSUs)
- Port, Connector, and Cable Combinations
- Troubleshooting
- Expansion Options
- Restricted Procedures
- Contacting Us

Hardware Reference 35
C613-03075-00 REV A
Figure 14: Installing DIMM.
Testing DIMM
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 the system information shown in Figure 15 on page 36. In the
output’s memory section there should be an entry showing 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. Repeat the installation
process, paying particular attention to the DIMM insertion step.
8948DIMM
DIMM
DIMM slot
10/100Base-T ports
SFP sockets
Retaining latch
Retaining latch