Doorking 1812 Plus

1 5 grounding and surge suppression 1 6 wiring one 1812 to a telco line telephone mode 1 7 wiring one 1812 to the internet telephone mode. This unique communication and access control system allows homeowners to use their existing telephone as an intercom. Html ideal for single family small businessthe 1812 series is a unique telephone intercom system that allows homeowners to use their telephone as an intercom to speak to a guest at a front door or gate without having to pay for an additional telephone line at their home.

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