User`s guide

7-2
Diagnostics and Troubleshooting
• Power-up
• Reset using the front panel reset button
• Reset via the NMS (a soft reset)
• Automatic reset occurs in response to a non-recoverable failure
The power-up diagnostics test processors, memory, and other
critical components on all ATX modules. Power-up diagnostics
also verify proper interaction between all system modules.
The processors on the PPE are tested first, and then each of the
interface modules is tested in order (from top to bottom of the
unit). LEDs on the front panel indicate progress of the power-up
diagnostics sequence and the status of each module as determined
by the power-up diagnostics.
If an interface module fails a critical test, it is automatically
disabled. When the power-up diagnostics are completed (within
60 seconds after power is applied), the main element module
gathers the test results and generates and sends appropriate traps
(alarms or event messages) to the NMS.
All diagnostics software is stored in nonvolatile memory
(EPROM).
7.2.1 Power-up LED Sequence
When you power up your ATX, the following occurs:
1. All LEDS turn on briefly (this does not apply to all 10 Mbps
Ethernet models, refer to the individual modules Users
Guide).
2. Individual module LEDs become active, starting with the
LEDs on the PPE and continuing downward until all the
modules have completed power-up diagnostics.
a. The POWER STATUS, ENGINE STATUS, and POWER
SUPPLY LEDs on the PPE and the POWER LEDs on the