The CircuitWerkes Telco-6 telephone ringer interface lets you easily interface up to 6 phone lines to indicators. For safety reasons it may only be used with voltages below 30V. Accepts up to six independent telephone lines Each incoming ring causes the associated relay to close for the duration of the ring Each relay has two independent sets of form c contacts rated at 24Vdc and 1 Amp High quality metal enclosure can be wall or table mounted All interface connections are on standard screw terminals