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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)
Changes to NSR27 02 Version (May 12, 1989)
(a)
(b)
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.
This NTP is converted to a new document style for NSR27.
The troubleshooting and fault-clearing procedures in Part 3 are
expanded from the NSR26 Standard version.
1
Practice 450-1011-501
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