Northern Telecom DNC-50 Mode d'emploi
450-1011-501
Network Operations Systems
DNC-50, DNC-100,
DNC-500
Dynamic Network Control
Systems
Maintenance and Troubleshooting Guide
Release: NSR27/28 02 Status: Standard
i
Practice 450-1011-501
Network Operations Systems
DNC-50, DNC-100, DNC-500*
Dynamic Network Control Systems
Maintenance and Troubleshooting Guide
Publication number: 450-1011-501
Product release: NSR27/28 02
Document release: Standard
Date: March 30, 1990
1989 Northern Telecom
* DNC-50, DNC-100 and DNC-500 are trademarks of Northern Telecom.
iii
Practice 450-1011-501
Table of contents
1. Introduction 1
Revision History 1
Document Release Information 2
An Overview of the Maintenance Tasks 2
How to Use this Guide 3
Getting Ready 4
2. Routine Maintenance 5
Servicing the Air Intake Filter 5
Cleaning the Tape Heads of the Cartridge Tape Units 7
3. Troubleshooting and Fault Clearing Procedures 11
Fault-Clearing Summary: Symptoms and Solutions 12
Rebooting the System 14
Using Software Reboot 14
Using the Reset Switch 15
Powering Down and Powering Up 16
Accessing the Maintenance Service in SAS 30
4. Replacing Cabinet Subassemblies 33
Removing a Fan Assembly 33
Installing the Fan Assembly 36
Replacing the Filter Door 37
1
Practice 450-1011-501
1. Introduction
This document provides on-site maintenance and troubleshooting information
for the DNC-50, DNC-100, and DNC-500 Dynamic Network Control Systems.
It is intended to support trained maintenance personnel.
The maintenance personnel may be an employee or employees of the
customer, if the customer has elected to take responsibility for on-site
maintenance. However, the maintenance personnel may also be employees of
the telephone company (if a leased system) or Northern Telecom, if a service
contract is purchased from Northern Telecom.
The procedures in this document are designed to serve all of these
arrangements. However, depending on contractual arrangements,
responsibilities for specific tasks may rest with different parties. In all cases,
the terms of your maintenance contract override any information in this
document.
Revision History
Changes to NSR27/28.02 Version (March 30, 1990)
The procedure for vacuuming the DNC cabinets has been updated.
Changes to NSR27/28 01 Version (November 10, 1989)
(a) The procedures for cleaning the Cartridge Tape Drive are expanded to
include the tape drive in the 1/4-wide tape SRU. It has a different
orientation than the tape drive in the mass storage SRUs. These
procedures are in Part 2. They are applicable to both NSR27 and 28.
Changes to NSR27 02 Version (May 12, 1989)
(a) This NTP is converted to a new document style for NSR27.
(b) The troubleshooting and fault-clearing procedures in Part 3 are
expanded from the NSR26 Standard version.
2Introduction
Practice 450-1011-501
Document Release Information
The release information for this document is found on page i. The information
includes the 10-digit identification number for the practice, plus the following
additional information:
(a) Date: This is the date the document was released for reproduction or
printing. It is not intended to be the same as the software or product
release date.
(b) Product release: This is the software or product release number
associated with the current issue of the document, plus the issue number
of document. The format is NSRaa bb, where:
•NSRaa is the Network Software Release number
•bb is a sequential issue number for the document that indicates how
many times the document has been released with the specified
software release.
(c) Document release: A rating code of Draft, Preliminary, or Standard is
assigned to the document, reflecting the current status of the document.
An Overview of the Maintenance Tasks
The tasks in this document are divided into three categories. One isRoutine
Maintenance, which documents the simple routine maintenance tasks
required by the system. Routine maintenance is always the responsibility of
the customer, regardless of whether the customer has purchased a
maintenance contract. These tasks consist of periodically cleaning the fan
filters at the bottom of the cabinets and cleaning the heads of the tape units.
The second category includes the Troubleshooting and Fault Clearing
procedures. These procedures are used to identify the source of faults and
potential solutions. The Maintenance Service of System Administrative
Services supports these procedures.
The Maintenance Service is a software program provided with the system's
base software that isolates and diagnoses faulty equipment and software.
Faulty units are automatically taken out of service by the system. The system
also provides for manually taking units out of service.
The third category is Replacing Cabinet Subassemblies. Because of the
system's modular design, most equipment can be quickly removed and
replaced by spare units. (The customer should have a spare for each type of
equipment on the site.) Except for the specific cabinet subassemblies
documented here, the equipment should be removed and replaced according to
the detailed procedures in the Installation Guide for Cabinet Systems,
450-1011-201.
Introduction 3
Practice 450-1011-501
How to Use this Guide
To simplify the use of the document and to improve its readability, the tasks
are described from the point of view of the maintenance personnel doing the
actual work. There may, however, be more than one person using the
procedures.
Also, other documents are used with this document, such as the Installation
Guide for Cabinet Systems, 450-1011-201, for removing and reinstalling
faulty equipment, and the Guide to System Administrative Services,
450-1011-301, for detailed information on how to use the system's
Maintenance Service and log messaging utility.
The maintenance personnel must either coordinate their efforts with the system
administrator, or be given access to System Administrative Services by the
system administrator.
4Introduction
Practice 450-1011-501
Getting Ready
Before starting any maintenance or troubleshooting tasks, ensure that you
have read the introduction of this document. Then, if you are going to install
or remove equipment, you should review the appropriate supporting
documents, such as the Installation Guide for Cabinet Systems,
450-1011-201, and the Guide to System Administrative Services,
450-1011-301.
Also, you should ensure that you have on hand the Site Records,
450-1011-152, so that you can make notations on the provisioning
worksheets. A list of tools is provided below for your convenience. Specific
tools required for a given procedure are noted in the procedure itself.
TOOLS:
1 hexagonal nutdriver (1/4 inches)
1 hexagonal nutdriver (3/8 inches)
1 hexagonal nutdriver (3/16 inches)
1 Allen wrench (5/64 inches)
1 small flat-blade screwdriver.
MATERIALS:
1 felt pen
1 pencil.
Autres manuels pour DNC-50
1
Ce manuel convient aux modèles suivants
2
Table des matières
Autres manuels Northern Telecom Système de contrôle
