User`s guide

Installing and Connecting to the Network
2-7
supplies. LEDs are described in Table 2-1.
When you power up your ATX, the following occurs:
1. All LEDs turn on briefly (this does not apply to all Ethernet
Switch models, refer to the Ethernet Switch Module User 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
modules are on for approximately 3 seconds.
b. The ENGINE STATUS LED on the PPE begins to flash.
c. The ENGINE STATUS LED continues to slowly flash while
the remaining modules are running power diagnostics.
d. The TURBO STATUS LED stays on for approximately 3
seconds; then it flashes.
3. After the last interface module has completed its power-up
diagnostics the Packet Processing Engine's ENGINE STATUS
LED will stay on solidly.
4. The TURBO STATUS LED will come on, followed by the
STATUS or PROC LEDs of the interface modules (from the top
down).
5. The LEDs will indicate that the ATX has begun proper
operation, as shown in Figure 2-3.
Troubleshooting the Power-up Sequence
If the power-up diagnostics sequence does not proceed as
described above, there are some things you can check:
1. Check each interface module to make sure it is fully inserted.