Hands-On DCO GENBAND (Stromberg-Carlson) Virtual Live Instructor-led Switch Maintenance and Troubleshooting Virtual Live Instructor-led or On-Site

Course Description

An accelerated version of the traditional GENBAND (formerly
Stromberg-Carlson and Siemens) DCO maintenance and
troubleshooting course, this class is designed to jump-start
students with little or no switching knowledge to a competency
where they can perform first-tier card-level repair on virtually
any of the main modules in the Digital Central Office DCO
switch. Topics of most interest can be emphasized, such as
processor interoperation, bus types, cabling, and cell
structures.

The multiple processor types are studied, including the MP,
FP, CP, and TPP, along with the Serial Line Units for system
console connections and the EAI. Different Line Switch types
are also discussed, and their architecture including the Line
Switch Controllers, Line Group Highway, and peripheral circuit
cards, along with interconnection to the TSI via the Port Group
Highway. Ancillary equipment such as SS7 links, recorder
announcers, ringing generators, remotes, and billing are also
explained, along with the different remote types including the
RLS, RNS, RLG, and both SLC-96 and GR-303 RDTs, which
requires the latest LLS variety, the DLS-1080.

Other important modules are described, including the CBC and
MCI, and their connections to Switchover Control, plus the DL and SSC interoperation with the Call
Processors, which control time slots. The Mass Storage Subsystem components are also described
including the MSDA hard drive and tape drive. Servicing of the MSDA tape drive is demonstrated,
extending the life of this important card.

Previous faults and any actual faults in the system can be used for analysis and research in
documentation. These non-intrusive exercises are used to troubleshoot the switch via symptoms
and documentation, and drill the correct troubleshooting techniques, including those normally
intended for a Maintenance-window. Basic translations and interrogation of overlays like ADM, RTR,
and TRK can optionally be used to familiarize students with directory number and trunk database.

Envisioned as a minimum 5 day track, the actual course length and content is flexible, and can be
adjusted depending upon the needs of the class. In addition to supporting independent problem-
solving skills, the course helps provide an excellent background for NOC and TAC interaction.

Students Will Learn

Specific TDM switch fundamentals including SS7
DCO system theory of operation
Modules Processors like the MP, CP, FP, and TPP, and the BMP control panel
Time Stage modules like the TSI, LSC, and interconnecting PGHs and LGHs
Maintenance access methods like SLUs, EAI, and maintenancesupervisory panels
Various Stromberg-Carlson Siemens documentation, and the EDDS
How to find cards within the system
How to test and replace various PWBA circuit cards
How to look-up alarms and determine most suspect hardware
Recovery actions
Basic DN and Trunk translations
And much more...

Target Audience

Technical staff such as Central Office Technicians, NOCSCC, certain management personnel, and
others responsible for the operation and maintenance of the DCO switching system.

Prerequisites

A basic understanding of telecommunications and switching principles is helpful due to the
accelerated nature of the course.

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
              - Time Division Multiplexing (TDM)
                     Pulse Code Modulation (PCM)
                     DS0, DS1, DS3
                     PGH & LGH Highways
                     Line Coding
                     AC & DC Signals
              - Transport: AMI, B8ZS
              - Carrier Signal Comparison
              - Binary & Hexadecimal overview
              - PSTN & CCS7 Overview
              - Why Legacy PSTN Support

Module 2: DCO® Theory of Operation
              - Time-Space-Time
                     Analog-To-Digital Conversion
                     Blocking & Concentration Ratio
              - DCO Functional Block Diagram
              - The DCO® Switching System
                     What is a Digital Central Office? (DCO®, DCO-SE, DCO-CS)
                     Switch Capabilities
                     Common Control Area (CCA) & Program Logic - CMF
              - Processor Types
                     Telephony Pre-Processor (TPP)
                     Call
                     Feature
                     Maintenance
              - Timeslot Interchange (TSI) SC Bus, Differential Bus
              - Mass Storage Subsystem
              - SS7 – SSC/CLC (DS0 & DS1 options)
              - Line Side Operations:
                     Timeslot/LGH/PGH
                     Local Line Switch (LLS), Remote Line Switch (RLS-x, RLS-4000)
                     LTF – Frame & Cell Common Equipment
                     DTI/GRP/Span
                     EWSD® & ONEUPTM Summary
              - Switch Hardware
                     Frame Types
                     Cells, PWBAs
              - Phone Call Sequence of Events (L-L, L-T)

Module 3: Input-Output Commands
              - Terminal IO
                     MCC, SIDCO, EAI, Virtual Terminal Driver
              - DCO® Commands
                     Minimum Character Recognition (MCR)
                     Help, Special Characters
                     Overlay Examples: RTR, TTU, TCOS, TRK, SS7, etc.
                     Command Syntax
                     Line Display by EN, List by EN, Short List
              - Adding SLU Terminals & Users
     - Sample Commands
                     UTL, TIMEC, STATUS, ADMIN, ROUTER

Module 4: Documentation
              - Support & Provisioning Documentation
                     Electronic Document Delivery System (EDDS)
                     .chm file format
                     00-040 Maintenance and Operations Manual
                     00-050 Operating Procedures
                     00-060 Maintenance Procedures
                     00-070 Input Manual
                     00-080 Message Dictionary
                     00-090 Status Reports
                     00-100 Equipment Removal and Replacement
                     00-011 Translation Guide
                     00-160 Emergency Recovery Guide
                     00-170 Alarm Surveillance Guide
                     Job Engineering Docs – S817 series
                     Implementation Procedures (IP)
                     Other Docs - IMDP, RP, GPA, IMs, CRL, CORCs
                     Schematic Diagrams & Optioning
              - Examples & Practice

Module 5 : Maintenance
              - System Status
                     STATUS, HOURLY, RNS, LG, LINEGROUP, etc.
                     OSPORT, ALPORT, LNLOUT, TKLOUT, RALINE, etc.
                     DBVER/DBCHEK, AUDIT, etc.
              - Line & DN
                     STATUS LS, LINEGROUP
                     CONFIG REMOVE & RESTORE
                     ADMIN LINE
                     TEST PORT LINE
              - Trunks
                     STATUS TOS, SPAN STANDARD
                     PORTST TKLOUT, OSPORT
                     PGH Grading: DBVER CONRPT, DBUTL DTSITE
                     MANUAL ROS/RPS, CONFIG REMOVE & RESTORE
                     TEST PORT DTI
              - Time & Date
                     TIMEC
                     CONFIG
              - Dumping Images
                     FILSYS Backup
                     UTL SCED
                     AUTOBK, AUTOTB
              - Reports
                     DBVER, COPY CFSITE, ADMDB, CPDB, LOAD etc.
                     AMOPT
                     RSMUTL
                     STATUS SPAN
             - Basic Maintenance Panels
                     ALMSEN
                     RNSBMP
                     Panel Functions
             - LLS Supervisory Panels
                     Panel Functions
             - MSDA/Archive 150S Tape Drive

Module 6 : Troubleshooting
             - Precautions & Preparations
                     Do You Understand the Work?
                     NOC/SCC Interaction
                     ESD
             - Troubleshooting
                     Alarm Levels, Diagnostic Types
                     AUDIT: SS7 CQT, SS7 CVT, MEMCHK, CNAM (SCP) Query
             - Alarm Messages
                     MML & PDS Formats
                     Alarm Sort Key Prefixes
                     Alarm and Message Processing (AMP) Messages
             - Recoveries
                     CONFIG SWITCH
                     SWITCH
                     REBOOT
                     RECOV
                     STATE4, 3, 2, 1
                     CPREST
                     RESTORE
                     CPSU, CPSU COLD
                     RSUTL
                     CRASHDUMP
             - Examples
                     No Dial Tone Recovery Procedure
                     LLS Outage Recovery Procedure

Module 7 : Translations Introduction
             - Translation Guides
             - DBVER
                     VAL ALL DONE, CONRPT
             - Line & DN
                     ADMIN - ADD, LIST, DISPLAY, CHANGE, DELETE, SUSPEND, etc.
             - Trunks
                     TCOS, DERV
                     RTR, TRK, TTU, ADMIN SS7
             - Tracing
                     ROUTER, TTU
                     Example: Fixing InterLATA Routing Issue

Module 8 : Frame Images
             - Equipment Location
                     Frames, Cells/CUA, PWBA, Backplane, Equipment numbering
             - Typical Floor Plan
                     LLS, LLSc Frames
             - Frame Types
                     Mnemonics
                     Image

Delivery Method

LIVE Virtual Instructor-led or On-Site with a flexible approach that adjusts content most relevant to students. Includes various non-intrusive labs, demonstrations, and exercises to help students focus on and retain the material presented.

Equipment Requirements
(This apply's to our hands-on courses only)

Physical or remote Access to switch is required for non-intrusive training.

BTS always provides equipment to have a very successful Hands-On course. BTS also encourages all attendees to bring their own equipment to the course. This will provide attendees the opportunity to incorporate their own gear into the labs and gain valuable training using their specific equipment.

Course Length

5 Days