Specifications

Chapter 3 Operation ASMi-52L Installation and Operation Manual
3-2 Controls and Indicators
Table 3-1. ASMi-52L Front Panel LEDs
Name Function
PWR (green) On – Power is ON
TST (red) On – A loopback test is active in local or remote unit
SYNC A
(red/green)
On (red) – Link A is not synchronized
On (green) – Link A is synchronized
Blinks – The line is connected properly and the
synchronization process is taking place
SYNC B
(red/green)
On (red) – Link B is not synchronized
On (green) – Link B is synchronized
Blinking – The line B is connected properly and the
synchronization process is taking place
DATA (yellow) Blinking – Data is being transferred
ALM (red) On – An alarm enters the buffer of local or remote unit
Table 3-2. ASMi-52L Rear Panel LEDs (Ethernet Option)
Name Function
ACT (yellow) Blinks according to Ethernet traffic activity (10/100BaseT
connector)
LINK (green) On – Good link integrity (10/100BaseT connector)
Table 3-3 shows the normal status of the indicators a few seconds after the units
are synchronized.
Table 3-3. ASMi-52L Indicator Status
Indicator Status
PWR ON
TST OFF
ALM OFF
SYNC ON (green)
If the above LED indications do not appear following initial power turn-on, refer to
Chapter 6 for diagnostic test instructions.