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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Routine Maintenance Procedures
Page 5-3Handling Control Circuit Packs
5
2. Lift the locking lever until the latch pin engages.
3. Restore power to the PPN using the procedure in ‘‘
Restoring Power’’.
4. Verify that the circuit pack LED indications are correct.
5. Test the replaced control circuit pack by issuing the system technician
commands after power has been restored.
Network Control Circuit Pack
!
WARNING:
When a TN777B Network Control circuit pack is reseated or replaced, the
correct date and time setting must be manually entered and verified.
The TN777B Network Control Pack holds a translation card. Before this circuit
pack is handled, remove the translation card.
1. Check that the "card in use" LED is not lighted. Otherwise, removing the
memory card may damage the data recorded on it.
2. Carefully pull the translation card from the card slot.
To insert the card into the slot:
1. Take the translation card and hold it in front of you so that the card’s label
is facing to your left.
2. With the card in this position, insert the shorter edge of the card into the
mounting slot. Then, gently push the card forward until you feel some
resistance at the opposite edge of the card. Once you feel this resistance,
the card is inserted. About 3/4 of an inch of a fully inserted card should
appear outside of the card slot.
!
WARNING:
Remember, assuming you are directly facing the circuit pack, the
card label should be facing to your left. If this is not the case, remove
the card and start again.
3. Test the inserted card by issuing the test card-mem system technician
command.
EPN Control Circuit Packs
Control circuit packs are unseated, reseated, replaced, and tested in the same
way as Port circuit packs. Refer to the ‘‘
Handling Control Circuit Packs’’ section in
this chapter. Note the special precautions required when handling the TN776
and TN570 Expansion Interface (EXP-INTF) circuit packs and the EPN TN768
and TN780 Tone-Clock circuit packs.