T1/T3 Components, Installation and Troubleshooting
Onsite presentation only


Learn how to install, activate, configure, test and troubleshoot a T1/T3 network.

By participating in this training seminar, you will:

  • Master the fundamentals of T1, T3 and SONET
  • Build and operate a full end-to-end T1 facility at each workstation
  • Evaluate T1 voice and data interface options, applications and performance criteria
  • Monitor framing and signaling formats, verify T1 signaling
  • Discuss the technical, financial and operational differences between implementation of Fractional T1, T3 and other WAN and access technologies
  • Master the five main T1/T3 activities - installation, activation, acceptance testing, troubleshooting and network synchronization
  • Identify and resolve system failures on a fully operational T1 network
  • Develop troubleshooting skills in 3 main problem areas- Span, demarcation and customer premises equipment
  • Isolate problems methodically and eliminate "finger pointing"
  • Understand the meaning of various alarms and what action to take to resolve problems

Who Should Participate

Current or future users of digital systems and facilities who require a thorough understanding of digital transmission technology, equipment operation and terminology.


Introduction to T1/T3

  • What is DS1/T1?
  • What is Fractional DS1/T1
  • What is DS3/T3
  • History of Digital Carriers
  • Benefits of Digital Carriers
  • DDS Service
  • Digital Signal Hierarchy (DS0-DS4)
  • E Carrier Comparison to T Carrier

T1/E1/T3 Signal Components

  • Signal Coding Options
    • B7Sub/B8Sub
    • Zero Code Suppression
    • AMI
    • B8ZS/BxZS
    • HDB3
  • Framing Options
    • D1/D1D/D2/D3/D4 History
    • SF/D4
    • ESF
    • E1 Multiframe
    • DS3/T3 C-Bit, M13
  • Formatted vs. Non-Formatted
  • Signal levels and Standards

Network Elements

  • Multiplexers
    • M24
    • M13/M12/M23 - DS3/T3
    • M44/M55 - ADPCM
    • Channel Banks
    • Sub-rate Mux/DS0-A/DS0-B
  • Data Service Unit (DSU)
  • Channel Service Unit (CSU)
  • Network Interface Units
  • Line and Office Repeaters
  • Central Office Equipment
    • DACS/DCS
    • Drop and Insert
    • DSX Bays

Introduction to SONET

  • Definition of SONET
  • SONET Hierarchy
  • SONET Network Elements
  • SONET Channel Decodes
    • Overhead Bits
    • Virtual Tributaries
  • SONET Coding and Framing
  • SONET Topologies and Networking
  • Use with new and future technologies
  • WDM and DWDM

Interfacing Voice

  • Analog Circuit Specifications
  • Channel Structure
  • Signaling and Supervision
    • CAS Signaling - A/B/C/D bits
    • CCS Common Channel Signaling (SS7)

Interfacing Data

  • Input Standards
    • RS-232C through EIA-232F
    • V.35
    • EIA-530
    • EIA-449
  • Network options
  • Use of T1 Standards in ISDN
    • Basic Rate Interface
    • Primary Rate Interface
    • H0/H11/H12

Testing Methods

  • Trouble Shooting Agenda
  • Alarm Structure and Logic
    • LOS/OOF - Red Alarm
    • AIS - Blue Alarm
    • RAI - Yellow Alarm
  • Loop Back Testing
    • Local and Remote Loop Backs
  • Error Checking
    • Bit Errors/Errored Seconds/SES
  • Analog Testing Procedure
    • Levels, noise
    • Distortion, jitter, P/AR
  • Cable Impairments and Testing
  • Power Impairments
  • Repeater Testing
  • T3/DS3 Testing
  • SONET Testing
  • Performance Objectives
  • Service Level Agreements
  • Remote Testing Alternatives

Network Synchronization

  • Synchronization Options
    • Synchronous
    • Hierarchical master-slave
    • Plesiochronous
  • Stratum Clock Sources and Levels
  • Clocking Options
    • Internal/External/Looped
  • Slips, Wander and Jitter
  • Standards

Circuit Installation and Acceptance

  • Capacity and Network Design
  • Media Selection
  • Bit Error Testing and Requirements
  • Test and Stress Patterns/Codes
  • Acceptance Criteria
  • Installation Testing - SONET
  • Technical, Financial and Operational Differences of T1/T3 and SONET Options
  • Interfacing of Video Options
  • Future Options and Technologies
  • T1/T3 Test Equipment
    • BERT Set/TIMS Set
    • TDR/OTDR
    • Drop and Insert Testing
    • Monitor Jack and DSX Testing

Dates, Locations and Registration

Recommended Follow-on Courses:

TCP/IP Networking


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Hands-on Labs

Lab 1: Install a T1 circuit from demarcation point through local distribution wiring to a CSU.

Lab 2: Use test equipment to see signaling states and T1 framing conditions.

Lab 3: Configure station equipment-option DTE.

Lab 4: Perform loopback tests through system components.

Lab 5: Use test equipment to verify various failure conditions found on in-service spans.

Lab 6: Perform Bellcore standard acceptance tests on T1 circuits.

Lab 7: Verify correct framing options.

Lab 8: Benchmark the systems using T1 test equipment to perform tests of signal level, BPVs, frequency, frame slips, EFS and bit errors; verify channel operation.

Lab 9: Your systems will be made to fail. Determine the problem, the equipment causing the problem and, if possible, correct the problem.

Registration Fees

Pricing for an on-site course delivered at your location is determined based on a "Base Fee" for up to four attendees, and a per person fee for each attendee thereafter. On-site fees are all inclusive.

Base Fee for up to 4 participants - $12,995 includes:

  • 3-day instructor-led training course
  • All training materials
  • Equipment for hands-on exercises
  • Certificates of completion
  • Instructor's travel and lodging expenses

Additional participants - $995 each

The site must provide suitable meeting space, any desired meals or refreshments, and the following presentation supplies:

  • A flip chart easel with paper and markers
  • Projection screen

Register securely online with confidence or please call (708) 246-0320.

Request In-House Training

T1/T3 Training Course, up to 4 participants, $12,995
Additional Attendees, $995 per person

More Training and Certification Courses

For more training options, see the entire Telecommunication & Network Training Calendar of dates and locations.

Terms & Conditions

Payment is due prior to the seminar.

On-site training scheduling and cancellation policy.  On-site training fees must be paid to reserve a training date.  Additional travel surcharges will be charged for travel to training locations outside of the continental USA and for training courses scheduled within three weeks, or paid for within three weeks, of the on-site delivery date.Organizations may cancel up to 21 days in advance of the seminar delivery date for a full refund, less administrative fees of 25% of the base fee.

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