- Integrate your public address system with nearly any phone system- Cut out background music during paging- Electronic night bell from ringing line or contact closure- Floating 600 ohm output- Selectable 22V DC talk battery for interfacing with unused phone system line input/trunk ports- Paging port interface- Ringing analog line input for night bell- Contact closure input for night bell- DPDT normally open and normally closed VOX activated contacts for cutting out background music- Adjustable VOX contact time-out- Adjustable VOX trigger sensitivity- Adjustable ring volume- Adjustable ring pitch- Power: 120V AC/12V DC 500mA UL listed adapter provided- Dimensions: 111mm x 76mm x 36mm (4.38� x 2.97� x 1.38�)- Shipping Weight: .48 kg (1.06 lbs)- Environmental: 0�C to 32�C (32�F to 90�F) with 5% to 95% non-condensing humidity- Relay Contacts: 30V DC@1A 110V [email protected] 125V AC @0.5- Maximum Ring Output: 490mV AC RMS no load 150mV AC RMS@600 ohms- VOX Minimum Audio Signal to Activate Relay: 30mV AC RMS@1K Hz- Talk Battery: 22V DC