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The Norstar Doorphone is a digital two-way intercom that allows a Norstar telephone user inside a building to monitor and communicate with visitors outside the building.
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The Norstar Doorphone is a digital two-way intercom that allows a Norstar telephone user inside a building to monitor and communicate with visitors outside the building.
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Allows you to unlock doors or activate other devices thru any phone in your Norstar system.
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