Analog external telephone line, Sinthesi S2, 2 buttons

Independent intercom device that allows the external intercom unit to be connected directly to an analogue input of a PBX.
Base module equipped with 2 buttons (expandable up to 64 buttons using the 4-call button expansion accessory code 1148/4), each of which can be associated with 2 numeric destinations of 24 digits (for day/night service or sequential calling), 2 independent and configurable relay actuators, each of which can be associated with up to 6 door opener codes, configurable in 8 different operating modes (e.g. lighting, sequential opening, for additional doorbell, gradual door opening).
Also expandable via numeric keypad accessory code 1148/6, which allows the entry of access codes or public telephone numbers or internal PBX numbers.
Main functions: auto answer, two two-digit codes to end the conversation, two codes to activate outputs via phone with a single pulse and two codes with a double pulse, automatic answer to incoming calls with variable ring count, ability to configure the time before hanging up when making a new selection, two codes to deactivate the intercom system from the phone, self-powering, nameplate illumination from external power supply.
Speaker and microphone volume adjustment, with electronic volume adaptation via trimmer.
Easy hardware configuration via DIP switch, and software programming from the phone using DTMF tones (also remotely, by calling the Sinthesi S2 module) and from a PC using dedicated software and USB interface (1148/9). Programming access protected by password.