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Telephony Training Systems



The Telephony Training Systems are powerful learning tools that allow students to become familiar with the operation of modern telephone networks and digital private automatic branch exchanges (PABX). The training systems are also essential tools to introduce students to the Integrated Services Digital Network (ISDN).

The Telephony Training Systems are built upon the Reconfigurable Training Module, Model 9431. This module, which uses state-of-the-art digital signal processor (DSP) technology, can be programmed to act as different parts of a telephone network.

The courseware included with the training systems consists of a series of five student manuals, an instructor guide for each student manual, and a user guide.

Features & Benefits

  • DSP-based processing allows flexibility and provides real-life experience, stimulating the student
  • DSP-based reconfigurable training system easily upgradable to emerging new standards and systems
  • System can be configured for different international standards
  • When configured as a digital PABX or when a digital trunk is set up, system allows study of the physical and network layers
  • Powerful and innovative system for studying modern telephone networks
  • Can be configured as a digital CO of the public switched telephone network (PSTN) or as a digital PABX
  • Add-on packages allows for a comprehensive training system
  • Comprehensive curriculum
  • Fault-insertion capabaility for troubleshooting purposes
  • Minimal hardware interfaces are required
  • Enhanced flexibility through the elimination of front panel controls and diagrams
  • Software allows display of diagrams, signal observation, settings changes, etc.
  • Estimated total program (including all add-ons): 100 hours

Topic Coverage

  • Analog Access to the Telephone Network
  • Central Office Operation
  • Digital PABX
  • PABX Analog Trunk
  • Digital Trunk

List of equipment

DescriptionSystem Number
Telephony Training System - Analog Telephone 8086-1
Telephony Training System - Digital Telephone Add-On 8086-2
Telephony Training System - Analog Trunk Add-On 8086-3
Telephony Training System - Digital Trunk Add-On 8086-4

Additionally required equipment

Qty DescriptionSystem Number
1 Personal Computer 8990


Part of the functional block diagram of a CO as observed in the LVTTS software.
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System settings and options are configured through windows in the LVTTS software.
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Real signals can be observed in both the time and frequency domains using virtual instruments included with the LVTTS software.
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The Call Processor Log in the LVTTS software allows all events that occur during a call to be recorded. These events can then be played back sequentially to display what happens in the system (CO or PABX) when a call is established and terminated.
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The Call Processor Log in the LVTTS software can display ping-pong type diagrams that illustrate sequences of ISDN layer-3 messages exchanged during telephone calls.
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The Call Processor Log in the LVTTS software can display the detailed contents of the ISDN layer-3 messages recorded, down to the information element (IE) components.
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Example of a simple telephone network.
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Telephony Training Systems
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Texts that will be displayed have been partly translated by an automatic translation system.

To view any text in its original language (English), leave the mouse pointer on this text (or touch the text if you use a tablet).