V180808N
T-APS Users Manual
Page 4
6. LED Indicators:
RUN LED:
While running properly, the RUN display light should be blinking.
1:1 LED
: The 1:1 light will be on when the units are set in the 1:1mode. The 1:1 light is off when the units are set
in the 1+1 or Blind modes. While the LOOK IN function setting is ON, the 1:1 LED will be blinking when the CPE
side had a fault.
E1 LED
: It will be on in the E1 setting.
T1 LED:
It will be on in the T1 setting.
L1 LED
: It will be on if L1 is on active path.
L2 LED:
It will be on if L2 is on active path.
Blinking events:
First setting the L1 as the active and L2 as protection path, the L1 light will be on and L2 light will be off. In the
event of automatic switch to L2, the L2 light will flash quickly before L1 light turns off. The L2 light will then be on
and L1 light off if switching succeeds.
In the event of fault from CPE side in L1 active and L2 protection path setting, the LOOK IN Function will apply
(see Setup, Selection B LOOK IN ). Setting the LOOK IN Function On will indicate the CPE side fault by
showing L1 light on and 1:1 LED light blinking.
In the event of L2 protection path fault, the fault is also indicated as L1 light on and L2 light blinking. The fault
from CPE failure or L2 fault can be easily distinguished by MEASURE ERROR RATIO function.
LOS LED:
Loss Of Signal light will be on if the connection is lost of signals.
OOF LED:
Out of Frame light will be on if the connection is out of frame.
AIS LED:
Alarm Indication Signal light will be on when alarm signal received.
RAI LED:
Remote Alarm Indication light will be on when remote unit fault received
Fail LED:
Failure Light will be on if a system fault or a circuit failure occurs.
1:1 CHK
Light on indicates a failure for the units to communicate in the 1:1 mode.
ACO LED:
The ACO button on the control panel can turn off the Buzzer noise and ACO LED light will be on.
Please note: the ACO button does not cancel the ALARM signal. When the ALARM signal is gone, the ACO LED
light will be off.
ESC
Enter
Auto Protection Switch
Dataprobe Inc T-APS
T-APS
ACO
Run 1:1
E1
T1
L1
L2
LOS OOF
AIS
RAI
Fail
1:1 CHK
ACO
LOS OOF
RAI
AIS
