LIGHT WEIGHT PORTABLE CONTROL TELEPHONE 4 WIRE / 2 WIRE – IRS: TC 78-2000 Approved in Part- I.

SCOPE :-

The Light Weight Portable Control Telephone [LWPCT] is a part of the 4 Wire / 2 Wire Emergency Train Traffic control system which provides intercommunication between any way side point along the Train Route and the Controller with 4 Wire / 2 Wire LWPCT – selects by itself for communication with traffic controller, as per provision in socket – located along the Railway tracks for 4 Wire / 2 Wire lines.

The caption LWPCT UNIT can be connected through 6 pin socket with the switch for selecting for 4 Wire / 2 Wire operations is housed in Acrylonitrile Butadiene Styrene [ABS].

The “USER” has to operate the Micro – Switch [Press to Talk] till his conversation is over.

FEATURES :-

1. The system works on 3V DC [1.5V X 2 Dry CELL – Pencil Cells].
2. The batteries are housed in a leak proof compartment.
3. The Telephone instruments is moulded of ABS [Acrylonitrile Butadiene Styrene] plastic powder.
4. Glass Epoxy PRINTED CIRCUIT BOARD [P.C.B.] is used for better environmental performance.
5. Ferrite core Transformers are used for miniaturization and better quality performance.
6. The LWPCT Telephone unit has Trans and Receive speech circuits.
7. Condenser Microphone & Electro Dynamic transducer are used for Transmitter & Receiver respectively.
8. Visual Indication:
   Dual LED [5mm] :-

1. Green LED for power ON indication.
2. Red LED for low battery voltage [10% below normal voltage].

• Equipment should be protected from:
  a)     Surge & transients current from lightning.
  b)     Acoustic protections to receiver.
  c)     Reverse Polarity.
• For 2 wire connection, separate L1 & L2 terminals are provided at the bottom of the telephone body.
• High reliability and sturdy switches are provided for “PRESS TO TALK”, “4 Wire / 2 Wire” selection and “ON-OFF” operations.

TECHNICAL SPECIFICATIONS:-

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