NEC NDA-24300 manual Dterm Fault

FAULT REPAIR PROCEDURES

1.7 Dterm Fault

Note 1: If a circuit card is replaced because only one line is faulty, no other lines in that circuit card can be used until the replacement is complete.

Note 2: If any of the in-house cable wirings short-circuit, the POW ALM lamp on the ELC circuit card lights. Remove the cause of the short-circuit and initialize the ELC circuit card.

START

ATTENTION

Contents Static Sensitive

Handling Precautions Required

When OPE lamp on the ELC circuit card does not illuminate

When BL lamp for each line is flashing or illuminating on the ELC circuit card

A

Confirm that MB switch of the ELC circuit card is in ON position (UP).

Confirm that station data (ASDT command) in the ELC circuit card is assigned.

Replace ELC circuit card with a spare.

Confirm that MB switch of the ELC circuit card is in ON position (UP).

Use MBST command to confirm that ELC circuit card has not been placed into make- busy state.

Check the station data (ASDT command) assignment.

Replace the ELC circuit card with a spare.

CHAPTER 5 NDA-24300

Page 318

Issue 1