
Appendix B LED Indicators User's Manual
B-6 LRS-24 LED Indicators LRS-24 RADview/TDM
Table B-12. ASMi-52CD/4 LEDs
Name Color LED On LED Off Blinking
POWER Green Always – –
DATA * 2 Yellow When data is passing When there is no data –
TST * 2 Red When a rest is running on the modem When not On –
ALR * 2 Red
SYNC A* 2 Red /
Green
When Loss of Sync occurs on Line
interface
SYNC B* 2 Red /
Green
When Loss of Sync occurs on Line
interface
ASMi-52 Standalone Unit LED Indicators
Table B-13. LRS-24 Front Panel LEDs
Name Color LED On LED Off Blinking
Front Panel
PWR green Power is ON
TST red A loopback test is active in a local
or remote unit
SYNC A red/green Red – Link A is not synchronized
Green – Link A is synchronized
The line is connected properly
and the synchronization process
is taking place
SYNC B red/green Red – Link B is not synchronized
Green – Link B is synchronized
The line is connected properly
and the synchronization process
is taking place
AIS yellow “All 1s string” is received at the
E1 interface
YELLOW yellow “All 1s string” is received at the
T1 interface
E1/T1 SYNC red Loss of E1 or T1 synchronization
DATA yellow Data is being transferred
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