Troubleshooting
Front Panel LEDs
During normal operation only the
CARRIER
front panel LED should be
constantly illuminated. The
DATA
LEDs
will flash as appropriate when data is
transmitted.
LED LABEL
CONDITION
NOTES
CARRIER
Even Flash
No communication with
remote unit - link or
multiplexer fault.
Uneven Flash
High error rate or
intermittent communication
on remote link.
Steady Green
Link OK - framing signal
present from remote unit.
ERROR
Not illuminated
Configuration OK.
Red
Configuration not
acceptable e.g. channel data
rate aggregate exceeds
available bandwidth.
LOOP
Not illuminated
No diagnostics running.
Green
Some Channels looped
or in QBF test modes.
DATA
Intermittent
Lit when channel passing
data.
