User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-660EXP-INTF (Expansion Interface Circuit Pack)
10
2. Disconnect the transmit and receive fiber pair from the lightwave
transceiver on the back of the Expansion Interface circuit pack slot. Note
which is the transmit fiber and which is the receive fiber for proper
reconnection at the end of this procedure.
3. Using a spare fiber jumper cable, interconnect the transmit and receive
jacks of the lightwave transceiver as shown in Figure 10-30 on the
following page.
4. Go to the front of the cabinet and inspect the yellow LED.
■ If the yellow LED is on steady, this Expansion Interface circuit pack
and the lightwave transceiver are functioning properly.
■ If the yellow LED is off, reseat the circuit pack. For the TN776, if the
yellow LED comes on steady after the red LED has gone off, the
Expansion Interface circuit pack and the lightwave transceiver are
functioning properly. For the TN570 [G1V5], if the yellow LED is off
steady after the red and green LEDs have gone off, the Expansion
Interface circuit pack and the lightwave transceiver are functioning
properly.
■ If the yellow LED flashes on at a rate of once per second, the
Expansion Interface circuit pack or transceiver should be replaced.
■ If the yellow LED flashes on at a rate of five times per second, the
Expansion Interface circuit pack or the lightwave transceiver may
need replacement. This condition may also be due to a faulty
system clock on the network containing this Expansion Interface
circuit pack. Refer to the procedure described in the preceding
"Relationship Between Expansion Interface and Tone-Clock Circuit
Packs" on page 10-651 section for further details.
5. Replace faulty component(s) and reconnect the original fiber. Be sure to
reconnect the fibers properly as noted in Step 3.
6. Release Expansion Interface circuit pack with the release board PCSS
command.