NEC ND-71762(E) system manual Start

MAINTENANCE PROCEDURE

(5)Diagnostic Work

START

When 13-J(Restoration from CCS Link Failure) is displayed after system message 13-H

When 13-J (Restoration from CCS Link failure) is not displayed after system message 13-H

FAULT SUPERVISION :

A CCS link failure occurred, but it has restored to normal.

Ask the distant office if it has not been placed into make-busy state for maintenance reason, etc.

When the distant office is not under make-busy state.

When DTI is in use as the control link to the distant office.

Check the carrier equipment.

FAULT : DTI, flat cable is faulty.

When MODEM is in use as the control link to the distant office.￿￿

When system message 13-Iis displayed.

￿Paragraphs 3.3

FAULT : MODEM and MODEM cable are

￿faulty.

￿￿

￿Paragraphs 3.4

FAULT : CCH/CCT circuit card is faulty.

￿Paragraphs 3.3 or 3.4

END

CHAPTER 8 ND-71762 (E)

Page 106

Issue 2