Two-Way Ringdown Circuit

Easily connect two standard telephones with this versatile telephone controller, designed for seamless communication over long distances. When either phone goes off-hook, the controller automatically initiates a call. The first phone off-hook receives 2 seconds of dial tone, while the second phone rings until answered (factory default setting). The "BUSY" LED indicator provides a clear visual status, illuminating when a phone is in use and turning off when both ports are on-hook or when the timer expires. For added flexibility, the dial tone and ringing can be disabled, and the controller supports four distinct ring cadences for customizable alerts.

Capable of connecting telephones up to 2.6 miles apart, this controller is perfect for remote setups requiring reliable communication.

Key Features:

• Power Supply: 120V AC/13.8V AC, UL-listed adapter included
• Current Draw: 600mA maximum
• Compact Design: 4.75" x 2.75" x 1.38" (120mm x 70mm x 35mm)
• Operating Environment: 32°F to 90°F (0°C to 32°C); 5% to 95% non-condensing humidity
• Ringer Output: 2.0 REN load maximum
• Talk Battery Voltage: 32V DC
• Dial Tone Level: -20dBm with a 600-ohm load
• Loop Length: Supports up to 2.6 miles (4.2 km) on a 24 AWG twisted pair
• Data Speed: Up to 28,800 bps
• Selectable CPC Break Time: 2 seconds or 150 milliseconds
• Connections: Two RJ11 jacks
• Telephone Power: Line-powered for convenience
• Warranty: Backed by a 2-year manufacturer warranty

This telephone controller combines reliability, functionality, and flexibility to meet the needs of residential, commercial, and industrial setups.