NEC NDA-24300 manual Replace the Dterm with a spare

FAULT REPAIR PROCEDURES

A

Check the faulty line on the MDF.

Note 1: Check can be made only on temporarily opened C.O./Tie Lines.

Note 2: Cross connection methods are explained on the following pages.

When the connection is not set up, the C.O./Tie Line is faulty

When the connection is set up

END

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

If the C.O./Tie Line is in Loop Start system:

Isolate the faulty line to C.O. side and to the system side.

Connect the test telephone to the C.O. side.

Confirm that Dial Tone (DT) is heard and the call is connected to the desti- nation party at the opposite office.

If C.O./Tie Line is any other type than Loop Start:

By cross connections on the MDF, connect the faulty line to a normal trunk.

By a designated connection from the ATTCON/DESKCON, seize the trunk connected with the faulty line (*E).

After the trunk has been seized, check to see if a call can be originated.

Replace the Dterm with a spare.

CHAPTER 5 NDA-24300

Page 326

Issue 1