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6 MAINTENANCE
6-5
6.2.3 T/M2 (external loopback test)
Function
T/M2 connects the optical cables to the module (loopback connection) and performs loopback
test. It tests the module from the communication part to the connector.
Connecting optical fiber cables
As shown in Figure 6-1, connect the TX of the primary ring to the RX of the secondary ring and
the TX of the secondary ring to the RX of the primary ring.
Setting switches
Set the module No. switch to A or B and the CPL No. switch to /00.
When the module is operating normally
The LED (TX LED) for transmission and LED (RX LED) for reception start to blink. All other
LEDs are off.
When a communication error occurs
The error LED (ERR LED) comes on.
Figure 6-1 Connecting Optical Fiber Cables (T/M2)
LQE010
OD.RING
ERR
RX
TX
MODU.
NO
PR
SR
CPL
NO
ERR
RX
TX
TX
RX
TX
RX
PR
SR
Summary of Contents for LQE010
Page 1: ......
Page 2: ......
Page 17: ...1 BEFORE USE ...
Page 21: ...2 SPECIFICATIONS ...
Page 23: ...3 NAMES AND FUNCTIONS OF EACH PART AND CABLING ...
Page 27: ...4 USER GUIDE ...
Page 39: ...5 OPERATION ...
Page 46: ...6 MAINTENANCE ...
Page 63: ...7 TROUBLESHOOTING ...
Page 79: ...APPENDIX ...