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4. Monitoring the Unit
4-14
February 2001 8784-A2-GB20-30
Front Panel LEDs
The following table describes the meaning and states of the LEDs on the
faceplate.
Type LED LED is . . .* Indicating . . .
SYSTEM OK
(Green)
On
Off
Slow Cycling
Pulsing
Device failure; system processing has
stopped.
No power is being delivered to the card.
Unit is in minimum mode and a download
is required.
Normal operation.
Alrm
(Amber)
On
Off
Device failure, or the Power-On Self-Test
(POST) has failed.
No alarms exist.
Tes t
(Amber)
On
Slow cycling
Off
Loopback test or 511 test pattern is
in progress.
POST is in progress.
No tests are active.
DSX-1 1, 2
(Green)
On
Slow cycling
Fast cycling
Off
Recoverable signal is present on the
DSX-1 interface.
Yellow Alarm Indication (RAI) is present.
An OOF, LOF, EER, or AIS condition
exists.
No signal is detected on the interface.
DSL PORT 1, 2
(Green)
On
Slow cycling
Fast cycling
Off
DSL link is up.
DSL training is in progress.
OOF condition exists.
DSL link is down.
* Slow Cycling: LED turns off and on in equal duration once per second.
Fast Cycling: LED turns off and on in equal duration 5 times per second.
Pulsing: LED turns off momentarily once per second.
TDM
SDSL
8784
SYSTEM
O
K
A
lrm
T
e
st
1
2
1
2
DSX-1
DSL PORT
00-16144a-01