Specifications

16 AT-9900 Series Switch
C613-03084-00 REV A
is displayed on the terminal or PC connected to ASYN0 and the switch pauses.
If a key is not pressed within a few seconds, the start-up process will continue
and all steps in the sequence will be executed. Press selected keys on the
terminal immediately after the “Force EPROM download” message is
displayed to change the switch start-up process.
During the start-up process the switch will generate four different types of
messages. All messages are preceded by one of the words INFO, PASS, FAIL,
or ERROR. The significance of these words is shown in the table below.
The following table describes start-up messages and their meanings.
Table 1-1: Switch start-up sequence keystrokes
Pressing key... Forces the switch to...
[Y] Load the EPROM release, with no patch.
[S] Start with the default configuration. Any boot script is ignored.
[Ctrl/D] Enter diagnostics mode.
Table 1-2: Switch start-up message classes
Message Meaning
INFO An action will be taken by the system.
PASS A test has been completed successfully.
ERROR An error message that a test has failed, but the system will continue to
operate.
FAIL An error message that a fatal error condition has caused the system to
halt in an unrecoverable fashion.
Table 1-3: Switch start-up messages and their meanings
Message Description
INFO: Self tests beginning. The code loader tests are about to begin.
INFO: RAM test beginning The RAM tests are about to begin.
PASS: RAM test, 131072k
bytes found
The RAM test passed, and the indicated amount of memory
was found and will be used by the switch.
ERROR: RAM test 5. Error
address = 00345678
A RAM test failed, at the given address. In the example, it
was the fifth test run. The RAM test repeats until it passes,
so a number of messages like this may appear. This fault
means that the memory system is faulty. If the fault
continues, contact your Authorised Allied Telesyn
distributor or reseller immediately.
INFO: BBR tests beginning The BBR battery tests are about to begin.
PASS: BBR test. Battery OK The BBR battery tests passed.
ERROR: BBR Battery low The BBR battery test failed, indicating that the battery is
running low. The BBR battery will need to be replaced.
Contact your Authorised Allied Telesyn distributor or
reseller.
PASS: BBR test, 512k bytes
found
The BBR size/location test passed, with the indicated
amount of BBR found.