Line Fault - NEC Univerge SV8500 Operation And Maintenance Manual

3.1

LINE FAULT

This section explains the fault repair procedure in a case where only one specific station line is in any of the
faulty conditions listed in Table 5-2.
FAULTY SITUATION
When Dial Tone cannot be heard
When dialing results in a wrong connection
When the bell does not ring
When call cannot be answered and speech cannot be
made
Dterm Fault
3.1.1 Check Point
When repairing a line fault, consider the following items:
(1) Check alarm lamps on line circuit cards.
(2) Check the fault line on the MDF.
CHAPTER 5
Table 5-2 Line Fault Situation
Section 3.1.3, Line Fault - When DT Cannot Be Heard
Section 3.1.4, Line Fault - When Dialing Results in Wrong
Connection
Section 3.1.5, Line Fault - When Bell Does Not Ring
Section 3.1.6, When Call Cannot Be Answered and Speech
Cannot Be Made
Section 3.1.7, Line fault - Dterm
– 597 –
Operation Procedure for System with PIR
REFERENCE SECTION