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Front Panel LEDs
TDM
SDSL
8774
00-16144-01
8774-A2-GZ40-30
The following table describes the meaning and states of the LEDs on the
Hotwire 8774 TDM SDSL Termination Unit's faceplate.
Type
LED
SYSTEM
OK
(Green)
Alrm
(Amber)
Test
(Amber)
DSX-1
1, 2, 3, 4
(Green)
DSL PORT
1, 2, 3, 4
(Green)
* 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.
February 2001
LED is . . .* Indicating . . .
On
Unit failure; system processing has stopped.
Off
No power to card.
Slow Cycling
Unit is in minimum mode and a download is
required.
Pulsing
Normal operation.
On
Unit failure, or Power-On Self-Test (POST)
has failed.
Off
No alarms.
On
Loopback test or 511 test pattern in progress.
Slow cycling
POST in progress.
Off
No tests.
On
Recoverable signal present on the DSX-1
network.
Slow cycling
Yellow Alarm Indication (RAI) present.
Fast cycling
An OOF, LOF, EER, or AIS condition exists.
Off
No signal on the port.
On
DSL link is up.
Slow cycling
DSL training in progress.
Fast cycling
OOF condition.
Off
DSL link is down.
5
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