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

38 AT-8900 Series Switch
C613-03075-00 REV A
Figure 16: AT-8900 Series diagnostics banner page.
To run a diagnostic program, enter the corresponding letter or number (or key).
There are several sub-menus to cover all the available options. Table 13 on
page 38 lists the control keys for diagnostic operations.
A reasonable understanding of the system’s structure is needed to operate
diagnostics and interpret the results.
To restore the switch to normal operation, use a pen or pencil to operate the
recessed reset button on the front panel, or press “0” (zero) to restart.
Contacting Us
With locations covering all of the established markets in North America, Latin
America and Europe, Allied Telesyn provides localized sales and technical
support worldwide. To find our representative nearest you, visit Allied Telesyn
on the web at: ht
tp://www.alliedtelesyn.com.
* * * Diagnostic Mode * * *
version: 16-Mar-1998
Main Menu:
0. Restart
1. Full RAM test
2. ROM checksum test
5. Battery backed RAM test
Enter selection ==>
Table 13: Basic commands for running the diagnostics.
Key Function
Q Quits any running tests and displays the banner page.
S Prints a summary of test results so far.