4. Monitoring the Unit
4-12
February 2001
8700-A2-GB25-10
Front Panel LEDs
The following table describes the meaning and states of the LEDs on the
faceplate.
Type
LED
LED is . . .*
* 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.
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.
Test
(Amber)
On
Slow cycling
Off
Loopback test or 511 test pattern is
in progress.
POST is in progress.
No tests are active.
SYNC PORT
1, 2, 3, 4
(Green)
On
Off
The port is operational.
No signal is detected on the port, or
DTR or RTS is off.
DSL PORT
LINK-UP
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.
4
TDM
SDSL
8775
SYSTEM
O
K
Alrm
Test
1
2
3
1
2
3
SYNC POR
T
DSL
POR
T
LINK-UP
4
00-15834-03
4
TDM
SDSL
8785
SYSTEM
OK
Alrm
Test
1
2
3
1
2
3
SYNC POR
T
DSL
POR
T
LINK-UP
4
00-16522-01