Nortel Meridian Meridian 1, Планирование, установка и инструкции по эксплуатации

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Chapter 25 — Fault locating and clearing Page 517 of 536
Option 11C Compact Planning, Installation, Fault Clearing and CCBR Guide
Clearing telephone faults
This section describes how to clear telephone faults.
Telephone faults
Components that can cause a telephone fault are:
• the telephone itself or add-on units
• the telephone power supply
• the building wiring
• the cross-connect from the telephone to the line circuit
• the unit on the peripheral line circuit card
• the peripheral line circuit card
• the ringing generator
• the cabinet power supply
If more than one telephone is affected, look for connections such as:
• they are on the same line circuit card
• there is a problem with ringing or tones
Use the following software programs and tests to isolate telephone faults:
• LD 30 to perform signaling tests
• LD 31 to test sets and consoles
Defective wiring to
console Make sure wiring is properly connected and wires are not
interchanged, crossed, or grounded
Check the wiring between the console and the cross-connect
terminal
Check the wiring between the PE shelf and the cross-connect
terminal
If there is a wiring problem, correct it.
Possible cause Action