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

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Chapter 25 — Fault locating and clearing Page 441 of 536
Option 11C Compact Planning, Installation, Fault Clearing and CCBR Guide
An alternate connection option for either local or remote access is to connect
to the system using Ethernet in the main cabinet.
Maintenance telephone
A telephone functions as a maintenance telephone when the class-of-service
is defined as MTA (maintenance allowed) in LD 11 or the telephone is
assigned as a Model 99.
A maintenance telephone allows the sending of commands to the system, but
can only use a subset of the commands that can be entered from a system
terminal. The maintenance telephone, however, takes priority over a system
terminal and will log the terminal out.
Tones and outpulsing can be tested using the maintenance telephone. Specific
commands for tone testing are given in Tone and Digit Switch and Digitone
Receiver Diagnostic (LD 34).
To enter commands on a maintenance telephone, press the keys that
correspond to the letters and numbers of the command. Refer to the section
“Accessing the system” on page 464 for information about entering
commands from a maintenance telephone.
Hardware maintenance tools
There are fault indicators and hardware features which help perform
maintenance tasks (particularly identifying and clearing faults). These
maintenance tools include:
• Circuit card features which perform self-tests, indicate status, and
minimize adverse affects on call processing.
• CPU controls which allow you to control common equipment functions.
• System monitor indicators which identify power and other faults.