NEC ND-71762(E) system manual Procedure a

Call the Distant Office and ask for repair. Replace the trunk card with a spare card.

ND-71762 (E)

DTI/CCT

LEADS

TA

TB

RA

RB

The DTI does not recover. (CCH/CCT Link Failure may occur, but ignore it.)

The DTI recovered. (CCH/CCT Link Failure may occur, but ignore it.)

INSTALLATION TEST PROCEDURE

(Procedure A)

START

A DTI/CCT is in use as the speech lines of No. 7 CCIS.

On the DTI/CCT card, set its MB switch UP.

In any office other than the Clock Master Office, disconnect the DTI cable connector at the DTI side (Back place of the PIM)

PLO alarm is generated, but ignore it.

The PLO starts running by itself.

Make the following connection at the MDF using a paired wire.

MDF CROSS

CONNECTION

System message “3-J” is not displayed.

The DTI/CCT is faulty.

System message “3-J” is not displayed.

The DTI/CCT is normal.

Call the distant office and ask for repair.

An analog trunk is in use as the speech lines of No. 7 CCIS.

Remove the cross connection wires and disconnect them from the external line side.

Connect a telephone set to the trunk accommodating terminals concerned on the MDF, and talk with the caller.

Normal

Abnormal

END

CHAPTER 5

Page 51

Issue 2