5
8774-A2-GZ40-30
February 2001
Front Panel LEDs
The following table describes the meaning and states of the LEDs on the
Hotwire 8774 TDM SDSL Termination Unit’s faceplate.
Type
LED
LED is . . .*
Indicating . . .
SYSTEM
OK
(Green)
On
Off
Slow Cycling
Pulsing
Unit failure; system processing has stopped.
No power to card.
Unit is in minimum mode and a download is
required.
Normal operation.
Alrm
(Amber)
On
Off
Unit failure, or Power-On Self-Test (POST)
has failed.
No alarms.
Test
(Amber)
On
Slow cycling
Off
Loopback test or 511 test pattern in progress.
POST in progress.
No tests.
DSX-1
1, 2, 3, 4
(Green)
On
Slow cycling
Fast cycling
Off
Recoverable signal present on the DSX-1
network.
Yellow Alarm Indication (RAI) present.
An OOF, LOF, EER, or AIS condition exists.
No signal on the port.
DSL PORT
1, 2, 3, 4
(Green)
On
Slow cycling
Fast cycling
Off
DSL link is up.
DSL training in progress.
OOF condition.
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.
4
TDM
SDSL
8774
SYSTEM
OK
Alrm
Test
1
2
3
1
2
3
DSX-1
DSL
POR
T
4
00-16144-01
