Cordless Phone

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Cordless Telephone Demonstrator With Faults Creating Facility SA-905

The trainer intended to demonstrate the installation and working of cordless Telephone and its signal/voltage analysis. The trainer is fully comprehensive, easy to understand and perform experiments on Cordless Telephone. This has Base Unit (Master) and Remote Unit or Handset Unit (Slave). RF link between Base and Remote unit for Intercom and DOT line interface. This has functional Block Diagram printed in multicolor on the front panel of the board with maximum test points and control sections, completely enclosed in elegant poly coated wooden cabinet separately for Master unit and Remote unit. The Master and Remote unit has detail block diagram of Dialer section, Speech Processing section, Hook switch, Rectifier section, Ringer section, System CPU section, RF Transmitter, RF Receiver and Antennas. Base unit control panel has Telephone IN, Telephone OUT, Handset Input, Pulse/Tone mode switch, Ring control and facility to connect external Audio Input from signal generator. Remote Handset unit control panel has Battery ON/OFF and facility to connect external Audio Input from signal generator. On board Power ON/OFF control. RF Transceiver 900 MHz. Distance 3mtr. LCD Display. Hands free option.TAM message. Facility of Pulse & Tone dialing. Facility of Mute, ON/OFF Hook Switch and Redial. Facility of Intercom.

Technical Specifications :

Line In Section - One DOT line connection port
Handset - One Handset connection port
Keyboard - 4X3 Matrix keyboard
Dialer - Tone and Pulse
Speech Path - Fully Non-Blocking
Dial Pulse Ration - 10pps ±10%
Tone Frequency - 430 Hz OR as per available Input source
Input Power - DOT lines and Intercom
Communication - RF 900MHz

Objectives :

To study the basic Principle and concept of Cordless Telephone.
To study the functional block Diagram of Master (Base) Unit.
To study the functional block Diagram of Remote (Handset) Unit.
To study the setting up of Remote unit with Base Unit.
To study the Dialer Section.
To study the Speech Section.
To study the Ringer Section.
To study the Power Supply Section.
To study Pulse Dialing and Tone Dialing.
To study the RF section of Base and Remote Unit.
To study switching mechanism between subscribers.
To study the Transmission and Reception of audio signals between Base and Remote Unit.
To study voltage and signal analysis on Base and Remote unit.