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Tummala
Meeting Requirements ... The Simple Way

Train Control Equipment

  • Control Room Equipment
  • 2 Wire Way Station Equipment
  • 4 Wire Way Station Equipment
  • Universal DTMF Way Station Equipment
  • Emergency Control Room Equipment

Telephones

  • 2 Wire Control Telephone
  • 4 Wire Control Telephone
  • Electronic Magneto Telephone
  • Selective Calling Telephone (Group Phone)
  • Handheld Telephone for Emergency Communication
  • 4 Wire Monitoring Telephone
  • Portable Emergency Telephone
  • Signal Post Telephone (Home)
  • Signal Post Telephone (Master)
  • STS Telephone
  • Handset With Microswitch

Interface Equipment

  • 4 Wire - 2 Wire Conversion Unit (Hybrid)
  • Branching Equipment (4way/6way)
  • Microwave Interface
  • Auto Exchange Interface For Accident Site Communication
  • 4 Wire Remote Interface For Accident Site Communication
  • DTMF Test Jig

Power Supplies

  • PSU for Control Room Equipment
  • PSU for Way Station Equipment
  • PSU for Selective Calling Telephone
  • PSU for Signal Post Telephone
4 Wire Monitoring Telephone
This telephone provides communication between the Station Master at a way side station and the Train Traffic Controller at a Divisional Office.
  • Overview
  • Technical Specifications

This telephone provides communication between the Station Master at a way side station and the Train Traffic Controller at a Divisional Office. The telephone can be directly connected to the 4 Wire underground cable circuits in electrified areas without the need for any way station equipment. This is very useful where additional telephone is to be provided in a station. The telephone can work from 3 Volts to 18 Volts power supply with very low current consumption. Speech amplifiers are provided in the telephone and the levels can be varied by trim pots provided.


The telephone is housed in an aesthetic ABS plastic cabinet and employs dynamic transducers for the transmitter and receiver capsules for speech clarity and long life. The send and receive efficiencies have been enhanced to a great extent to provide good audibility over long distances. The insertion loss is held very low to facilitate connection of several telephones in parallel along the way stations.

Tummala Product Code: TEL/WMT/98
Operating Voltage: 3 Volts to 18 Volts DC
Current Consumption: Listen: < 4mA
Talk: < 8mA
Send Efficiency: 0 to -15 dB
Receive Efficiency: 0 to -10 dB
Insertion Losses: Listen: < 0.2 dB
Talk: < 1.5 dB
Weight: < 0.7 Kg
Size: X x X x X
 
Tummala Electronics Pvt. Ltd.
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