8
Front Panel LEDs
The following table describes the meaning and states of the LEDs on the
Hotwire 8775 or 8785 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.
SYNC
PORT
1, 2, 3, 4
(Green)
On
Off
The port is operational.
No signal 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.
* 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
8775
SY
S
TE
M
OK
Alrm
Test
1
2
3
1
2
3
SY
N
C
P
O
RT
D
S
L P
O
R
T
LIN
K
-U
P
4
00-15834-03
