The RC-3 enables a standard Touch Tone phone to control up to 3 maintained ON maintained OFF or momentary relay contacts from a remote location. The RC-3 is fully user programmable and uses non-volatile E2 memory.Up to three RC-3s can be daisy chained on the same line to control up to nine relays.The RC-3 features switchable 12V talk battery allowing easy installation on the trunk port. In addition the unit can be connected directly to a C.O. line or analog PABX/KSU station.The RC-3 also features a built in pulse dialer activated by a contact closure from an alarm system temperature sensor etc. The RC-3 will dial the number up to three times sending alert tones indicating an emergency.Remote Control of: High security building entry systems.Door strikes and gates in conjunction with doorboxes (W-1000 etc.).Signs lights cameras sprinklers motors.Other contact controlled equipment.Can also be used as an emergency dialer for alarm systems etc. User Touch Tone programmable.Non-volatile E2 memory.12 digit alarm activated pulse dialer.6 digit security code (to access programming).6 digit access code (disable or enable for additional control security).Switchable 12V talk battery.Relay interrogation tones.Programmable relay time delays.Cascade up to three RC-3s to control up to nine relays.Programmable ring delay before answering.Status LEDs for relays 1 2 3 and the answer relay.One power adaptor can power up to three units.Power: 120V AC/12V DC 500mA UL listed adapter provided.Dimensions: 133mm x 89mm x 44mm (5.25 x 3.5 x 1.75).Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-condensing humidity.Pulse Dialing Speed: 10 pps.Talk Battery Output: 12V DC minimum (15V nominal).Relay contact ratings: .5A 125V AC/1A 30V DC.On hook time between alarm dialing: 2.5 seconds.Connections: (2) RJ11 jacks 10 position screw terminal strip.