7/28/2019 vEERANAM
2/3
Remarks----------------------------------------------------------------------------
Fibcom ------------------------------------------------ Railtel
----------------------------------------------
SITE ACCEPTANCE TEST
III) Test of Automatic Laser Safety (ALS) Feature of optical
Interface.
Test Description:
This test is performed to check the laser safety feature is
functional in a node. When the laser safety
feature is switched ON, in an event of optical receive signal
failure the optical transmit signal is switched OFF thereby
protecting the laser from undesirable operation.
Test Equipment
Power meter, Local Craft Terminal (LCT), Fiber optic patch
cord
Test Procedure:
Connect the power meter on the STM optical unit by using optical
patch cords and transmit the respectivelySTM signal.
Using the LCT establish connection on the SDH node and monitor
for any current alarms. Set the Automatic Laser Shutdown (ALS) to
ON using the LCT software. Now, disconnect the receive optical path
cord on the STM optical unit. This disconnection will be enable the
ALS
feature on the node.
Record the result. Repeat the above procedure for other
cards/Ports al
Results:
Slot-Port No. Optical Port Type
(STM-1/4/16/64)
Observation
(Pass/Fail)
Slot-Port No. Optical Port Type
(STM-1/4/16/64)
Observation
(Pass/Fail)
6325
OPT TX
LCT
OPTICAL Power meter
