ST-TC1

RDL ST-TC1 - Telephone System Coupler and CO Line Simulator

RDL ST-TC1 is a telephone system coupler designed to simulate a central office (CO) line for integration with local telephone switching units (KSU). It is not intended for direct connection to public telephone lines. The ST-TC1 connects to the KSU as if it were an incoming phone line, enabling paging or radio control functions when the line is seized.

When the KSU activates the line, the ST-TC1 provides a relay contact closure to trigger external systems such as paging or radio. A transformer-isolated 600 Ω audio interface allows for audio input/output and supports DTMF tones from telephone keypads or compatible devices.

Functionality

• Simulates a CO line for connection to local telephone switching units
• Relay closure when line is off-hook - activates paging or radio systems
• 600 Ω transformer-isolated audio input/output
• Passes DTMF tones - compatible with telephone keypads
• Can be used with ST-VOX1 for two-way communication
• Not compatible with lines carrying ringer voltage

Features

• Designed for paging and radio control integration with telephone systems
• Compatible with KSU systems - simulates incoming line behavior
• Maintains relay closure during line seizure
• Transformer isolation - protects against interference and ensures signal integrity
• Compact STICK-ON enclosure - easy installation in AV systems
• 24V DC power input - compatible with RDL systems

RDL ST-TC1 is a reliable solution for AV and telecom integrators, enabling seamless integration of paging, radio, and voice communication functions into telephone systems.