IT-4416 EPABX Trainer

Telephone exchange is serving mankind for decades. It is one of the best combinations of Analog, Digital & Mechanical circuits. The EPABX has undergone many phase of changes ever since its existence. EPABX trainer forms the basis of Analog telephone exchanges. Automatic switching can be performed and studied using real time waveforms. The functional blocks provides easy understanding of the working of the system. Visualizations of the switching and detections are explained with the help of software. A DTMF Telephone Trainer is also provided for better understanding of Telephony signals.

Description

Telephone exchange is serving mankind for decades. It is one of the best combinations of Analog, Digital & Mechanical circuits. The EPABX has undergone many phase of changes ever since its existence. EPABX trainer forms the basis of Analog telephone exchanges. Automatic switching can be performed and studied using real time waveforms. The functional blocks provides easy understanding of the working of the system. Visualizations of the switching and detections are explained with the help of software. A DTMF Telephone Trainer is also provided for better understanding of Telephony signals.

 

Features:

Required Circuits Tested

Each Section Clearly Marked for Input and Output

Polarity Protection

Monolithic Switching Matrix

Monolithic DTMF Decoder

Monolithic Dialer, Ringer

Each Section Clearly Marked for Easy Understanding

 

Technical Features:

Inputs: 6 Trunk / Direct Lines

Extension: 16 Lines

Switching: Cross Point Space Division (Microcontroller based)

Standard Features: Dial Tone, Busy Tone, Ringer, Ring Back Tone, Music on Hold

Dialing: DTMF and Pulse

Loop Resistance: Extension -600 Ohms, Co-line- 1200 ohms.

Cross Talk Attenuation: >70 dBm.

Configurable Features: Direct Access to trunk line, Redial, Line Status Indication, Call Transfer, Call Pick Up, Direct Access Trunk, Call Forwarding, Call Conference, Hot line System etc

Interconnections: 2 mm safety pins

Accessories: Power cord, Experiment Manual, Software CD and 2mm patch cords

 

Experiments included:

Introduction to EPABX units

Study of Power supply Unit

Study of Trunk Unit

Analysis & measurement of the ring detection phenomena

Study of the switching mechanism of relay

Analyze the OFF Hook detection

Study of Control Unit / Signal processor Unit

Study of DTMF Unit

To analyze the limitation of DTMF receivers (Limitation of space division switching)

Study of Clock Generation Unit

Study of Tone Generation Unit

Study of Music Generation Unit

Study of Switching Matrix Unit

Study of Ringer Unit

Software experiments