Hands-On DMS-100 System Maintenance and Troubleshooting Virtual Live Instructor-led or Available On-Site

Course Description

The Nortel DMS-100 is still one of the most common switches installed in the world today, and remains so due to its high reliability and low-latency for voice circuits.

This extensive Virtual Live Instructor-led DMS-100 course provides the skills required to perform maintenance and a high-degree of troubleshooting, and will walk the student through a practical understanding of the Genband (Nortel) DMS-100 switching system. It discusses the general system architecture used by all Digital Multiplex System switches, with functional block diagrams of the switch and its main modules, including the SNXAC front-end, the Network (JNET ENET), MS, CCS, IOD, and the various PM and LCM types for Line and Trunk peripherals, plus RCU, RLCM, OPM, and GR-303-compliant remotes. MAP and RTIF terminal use are explained, plus remote access through serial TTY and telnet. MAP alarm fault interpretation are demonstrated, using data from the MAP and from logs, showing the student how to locate suspect cards within the system. The Helmsman documentation viewer and Nortel Technical Publications (NTPs) are covered in detail, with an emphasis on documents used for maintenance and troubleshooting procedures.

Previous troubles are reviewed and used as exercises, including LNS line and TRKS trunk maintenance, but also parts of the SuperNodeXA-Core front-end (SN) including the Computing Module (CM), Network (NET), Message Switch (MS), and CCS (SS7) modules. Peripheral Modules (PM), and modules of particular interest to the students are emphasized. Different equipment types are compared where necessary (network CPU). IOD maintenance is also discussed, including procedures to back-up the Program and Data stores, and a discussion of how hard disks, tape, and billing devices are connected to the system. Special topics like the Star Hub, Remote Concentrating Cluster (RCC), Subscriber Module Access (SMA2), Emergency Stand Alone (ESA), Remote Measurement Module (RMM), etc. can also be discussed per the needs of the class.

Our non-intrusive exercises equip the student to conduct day-to-day maintenance activities and show how to perform troubleshooting procedures, including aspects of cabling and the backplane, which helps prepare them for higher-tier support interaction. The course is flexible, allowing the most important content for a particular group of students to be emphasized.

Students Will Learn

Switching Fundamentals
DMS-100 Theory of Operation
Terminal Access MAP, RTIF IP
Primary bays and modules used in the DMS-100, including different types of remotes, CCS7
connections, and different network (JNET vs. ENET) or different CPU (SN vs. XAC)
How to use the MAP Command Interpreter with CI, MAPCI
How to use Logutil and SERVORD commands
Use documentation including Helmsman viewer, NTPs, and installation methods
How to find the physical location of a fault
How to change cards in various bays
How to query directory numbers, view certain tables, and run hardwaresoftware reports
Basic service order processing
Where to find Emergency Action procedures
And much more...

Target Audience

Technical staff such as Central Office Technicians, combo-techs, and those who are responsible for the maintenance and troubleshooting of Central Office systems, plus NOCSCC personnel who must respond to alarms. No previous switching background is required, although some familiarity with CO equipment will be beneficial. Certain management and provisioning personnel will also benefit, providing a greater understanding of the resources needed for the system, and how to program it.

Prerequisites

A basic understanding of telecommunications and switching principles is helpful due to the accelerated nature of the course. Our BTS Telephony for Telecom Techs or our TDM Switching Fundamentals courses are available for students with little or no previous telecom background.

Course Outline

Module 1 : Switching Fundamentals

- T&R, E&M, 2/4/8 Wire

- Supervision & Signaling

Negative Battery

- AC & DC Superposition

- Decibels

logarithmic scale

copper & optical measurements

Digital: A/D & D/A Conversion

Nyquist Theorem

Multiplexing Samples

PCM bit depth - 8 bit, 10 bit

Time Division Multiplexing (TDM)

Pulse Code Modulation (PCM)

DS0/1/3

DS-30, DS-30A, DS-60, DS-512

E1, PCM30

SR128, SR256

Line Coding

AC & DC Signals

- Transport: AMI, B8ZS, OC-x, STS-x

- Carrier Signal Comparison

- Binary & Hexadecimal overview

- PSTN & CCS7 Overview

- Why Legacy PSTN Support

Module 2 : DMS-100� Theory of Operation

- Multiplexing PCM Channels

- Time-Switch-Time Philosophy

- DMS-100 Topology

- Switch Capabilities

- Functional Block Diagrams

- Time Stage/PM

- Space Stage/Network incl. 16K, 64K, 128K XPT

- Hardware Modules:

SuperNode & XA-Core, incl. SLM, RTIF

ENET & JNET types

IOC

LPP incl. LIU7 & EIU

PM Series I, II, & III

DS-30/512 Links

Aux PM: LCM, Drawers, BIC

SPM & OC-x

TM Peripherals

SMA2 & GPP: GR-303 remotes, EOC & TMC channels

Remotes: RCU, RLCM, OPM, DMS-1, RMM, etc.

Service Equipment

- End-to-End Call

Module 3 : Terminal Access - MAP & RTIF

- Maintenance and Administrative Position (MAP)

RS-232C, Terminal Server

- Map Login ($$, Break, ?), Logout

- Command Interpreter (CI) Commands

CI (Non-Menu) Commands

Non-Menu Commands

Menu Commands

MAP � command prompt, CM, MS, IOD, Net, PM, CCS, Trks, Ext, Appl

- Telnet

Terminal Server, EIU, table IPNETWRK, XAC ETHR

- Remote Terminal Interface (RTIF)

RTIF Indicators

9X26, NTLX03, NTLX08

RTIF-to-CM/XAC Cabling

- NTP 297-1001-129 - Input/Output System

Module 4 : Commands

- Sample CI Commands

SYS (Non-Menu) Commands: msg, restart, permit, etc.

Logutil

Tables

- Sample MAPCI Commands

Menus vs. CI

MTC, other choices, disambiguating menu choices

Lns & Trks sub-menus