Analogue interface for internal PABX connection for 2Voice system

The door phone interface Ref. 1083/87 allows connection of a 2Voice system to a PBX analogue extension input or to a PSTN analogue telephone line. This device allows managing a door phone call from a call station directly via a telephone. Using DTMF codes, it is possible to: answer an audio door phone call, open the door, open the driveway and send activation codes to a special decoder.