There are two types of door phone adaptors available for the DBS. The first type (VB-43701) utilizes a trunk connection to connect to the door box and is described below. The second type (VB-43711) utilizes a digital port extension to connect to the door box and door opener.
Each Door Box Adaptor (VB-43701) can be used to connect one door sensor and up to two Door Boxes (VA-43705) equipped with door openers.
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