3com 5000 ATM User Manual

Table 6-2 identifies appropriate corrective actions for each base module 
LED indication.

Table 6-2   Base Module LED Corrective Actions

MOD STAT

Green

Normal operating indication.

None required.

Off

No power to hub.

Check the controller module power 
LEDs.

The hub does not have enough 
available power for a new 
module installation.

Add another power supply to the hub.

Use the SHOW POWER BUDGET 
command to ascertain available power in 
the hub.

The ATM Backbone 
SwitchModule is faulty.

Insert a different ATM Backbone 
SwitchModule.

Yellow

Module failed power-on 
diagnostics.

Reset ATM Backbone SwitchModule 
(page 6-12).

Re-seat ATM Backbone SwitchModule in 
CoreBuilder 5000 hub.

Refer to “Recovering from Problems” on 
page 6-5.

PACKETCHANNEL

Green

SwitchModule is correctly 
inserted in hub and recognizes 
PacketChannel backplane.

None required.

Off

ATM Backbone SwitchModule 
is not connected to backplane.

Re-seat the ATM Backbone 
SwitchModule in the slot.

Slot does not support 
PacketChannel operation. To 
verify, enter the command 
SHOW MODULE. The General 
Information field states “ATM 
Slot” if the slot is reserved for 
ATM.

Install the ATM Backbone SwitchModule 
in slots 1 through 8 or 13 through 17.

PacketChannel backplane not 
installed or incorrectly installed 
in the hub.

Re-install the PacketChannel backplane 
or purchase a PacketChannel backplane. 
Contact your supplier.

Yellow

ATM Backbone SwitchModule 
transmitting heavy traffic levels 
to the PacketChannel 
backplane.

None required.

Yellow 
Blinking

ATM Backbone SwitchModule 
transmitting normal traffic 
levels to the PacketChannel 
backplane.

None required.