Maintenance-Object Repair Procedures
555-233-143
8-1438 Issue 1 May 2002
■ If the yellow LED flashes on at a rate of five times per
second, the circuit pack (Expansion Interface or Switch Node
Interface) or the lightwave transceiver may need
replacement. This condition may also be due to a faulty
system clock on the network containing the Expansion
Interface circuit pack or in the switch node carrier containing
the SNI.
■ If the yellow LED was blinking before starting this procedure
and the yellow LED is not blinking now, this circuit pack
(Expansion Interface or Switch Node Interface) and the
lightwave transceiver are functioning properly.
5. Replace faulty component(s) and reconnect the original fiber. Be
sure to reconnect the fibers properly as noted in Step 2.
6. Release Expansion Interface circuit pack or Switch Node Interface
circuit pack with the release board UUCSS command.
Figure 8-84. Interconnection of Lightwave Transceiver Transmit/Receive Jacks
Fiber Jumper
Tx Rx
Transceiver
Lightwave
Back Skin of Cabinet
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