• To understand the complete working principle of electronic private exchange.


Lab EPABX Dynamic Demonstrator is packed with various features to understand the complete working of communication through Electronic Exchange. To achieve the above objective our Demonstrator is provided with various fault inducing switches, and test points are derived from important sections like Micro controller, opto-isolator, matrix switch and programmable array logic. The schematic Block diagram of EPABX Exchange is screen printed on the front panel for student to understand at Block levels. EPABX dynamic demonstrator is provided with four extensions for the student to study the various programming techniques that is involved in EPABX exchange.


  • Extension to extension call.
  • Direct outward dialing.
  • Auto call back.
  • Trunk camp on.
  • Call consult.
  • Call split.
  • Conference.
  • Call forwarding.
  • Follow me.
  • Call pickup.
  • Call waiting.
  • Delayed hotline.
  • Dynamic locking.
  • Last extension recall.
  • Dil hunting.
  • Simultaneous Ringing
  • Pulsing on trunk
  • Test Points & Faults Switches are provided to observe the waveform and to understand the cause and effect.

Features of the Trainer

Input Supply 230 V AC/50Hz mains operated
Housing It is mounted in an elegant cabinet for better viewing and portability
Dimension 82cms x 48cms x 19cms
Weight 15Kgs
Instruction Manual Step-By-Step detailed instruction manual.


This trainer is a glass-epoxy printed circuit board and all the symbols screen-printed on the front panel so that it enables the student to conduct the experiments easily

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