NEC NDA-24300 manual When Call Cannot Be Answered and Speech Cannot Be Made

FAULT REPAIR PROCEDURES

1.6 When Call Cannot Be Answered and Speech Cannot Be Made

Note: 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.

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

START

Check the faulty line on the MDF.

When speech can be made

When speech cannot be made

END

Isolate the faulty line to the in-house wiring side and to the system side.

Connect the test telephone to the system side.

Call the faulty line by station-to-station calling.

Replace the telephone set with a spare.

Replace the LC circuit card with a spare.

NDA-24300CHAPTER 5

Page 317

Issue 1