Precision Audio and AV Interface Products

Radio Design Labs

ST-TC1 Telephone System Coupler - CO Line Simulator

  • Simulate a Telco CO Line
  • Connect to local telephone switch or instrument
  • Add Radio Control or Paging to KSU
  • Contact Closure when Line is Off-hook
  • Audio Input/Output from Telephone Switching Unit
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The ST-TC1 is intended to be connected to an on-site telephone system switching unit KSU. It is NOT intended to be connected directly to a telephone CO line. Connections from the ST-TC1 go into the telephone switching unit as if the ST-TC1 was an incoming phone line.

When the KSU seizes the line to the ST-TC1, a relay contact closure is provided which can be used to control a variety of equipment, such as a paging system or radio system. The closure is maintained as long as the line is seized. A 600 Ω transformer-isolated audio feed is available for audio input to or output from the telephone switching unit. The ST-TC1 will pass DTMF audio from a telephone keypad or other DTMF generating device.

The ST-TC1 may be utilized to add paging zones or radio system interface to a telephone system. When any instrument in the telephone system seizes the line associated with the ST-TC1, the relay closes to activate the radio or paging function, and the audio spoken into the handset is broadcast. The ST-TC1 can not be connected to a phone line that has ringer voltage present.

The ST-TC1 can be used in conjunction with RDL's® ST-VOX1 modules to provide two-way communication. The ST-VOX1 will provide the necessary push-to-talk function to key the two-way communications systems.

Applications

Line Connection:
Simulated telco central office line to feed telephone system
Audio In / Out Impedance:
600 Ω balanced
Switching Contacts:
Double-pole, double-throw
Max. Switching Power:
60 W, (220 Vdc, 125 Vac, 2 A)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 50 mA
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.205 lbs.
WEEE weight:
0.155 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
High Res Images:
Format
Declaration of Conformity:
Format
PDF
A&E Specifications:
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STICK-ON SERIES

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ST-TC1 ST-TC1