SWAN Concentrator and WAN Subsystem Troubleshooting Guide

Verifying the SWAN Hardware
SWAN Concentrator and WAN Subsystem Troubleshooting Guide—426992-008
4-16
SWAN Concentrator LEDs
Table 4-1. SWAN Concentrator LEDs
Label Color Function
POWER Green The power LED is on when the power is on and off when the
power is off.
If the power LED does not come on, replace the SWAN
concentrator.
FAN Amber The fan LED is on when the fan stops turning and off when the
fan is turning.
If the fan LED goes off, the SWAN concentrator might
overheat. If you discover that the LED is not operational, re-
place the SWAN concentrator.
FAULT Amber There are three fault LEDs, one for each CLIP. The fault LED
flashes during the POST and goes off when the POST
successfully finishes. If the fault LED remains on, one or more
of the POST tests failed or never started.
If all three fault LEDs remain on, or if any of the three fault
LEDs continues flashing, replace the SWAN concentrator.
LINK Green There are two link LEDs, one for each Ethernet port. The link
LEDs are on when the SWAN concentrator is receiving link-
integrity pulses from the remote port and off when there is no
link integrity between the SWAN concentrator and the Ethernet
port.
You should verify link integrity at both the local and remote
Ethernet ports. Loss of link integrity can indicate a bad cable.
COL Green There are two collision LEDs, one for each Ethernet port. The
collision LEDs flash when a collision occurs and go off when
there are no collisions.
Collisions are normal. They are not a problem unless they
reach an excessive level. Determining what is an excessive
level is site-specific.
TX Green There are two transmit LEDs, one for each Ethernet port. The
transmit LEDs flash when the SWAN concentrator is
transmitting data and go off when it is not.
RX Green There are two receive LEDs, one for each Ethernet port. The
receive LEDs flash when the SWAN concentrator is receiving
data and go off when it is not.