Networked Door Access System with VoIP Call Forwarding
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Solution Overview
Problem
Existing access control systems for multi-unit premises lack efficient remote access and communication capabilities, particularly for tenants who are not physically present, and often rely on outdated voice-only or limited video and voice solutions.
Innovation Solution
A network-connected door access system with primary and secondary interface devices, including VoIP technology, allows users to select units, initiate calls, and monitor trigger conditions, forwarding calls to mobile devices for remote access and communication, enabling video and audio interactions and secure entry management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional voice-only or limited video doorbell systems are used in multi-unit premises, then basic access control is provided, but remote access capability for absent tenants and communication efficiency are insufficient
Solution Approach 1:
The system introduces a network server as an intermediary between the door station and tenant mobile devices. The server receives requests from the door station, identifies the target tenant, and routes communications accordingly. This mediator enables remote access without requiring direct complex connections between all components, resolving the contradiction between enhanced adaptability and operational simplicity.
Solution Approach 2:
The door station is designed with multi-functionality, supporting both traditional local intercom operations and modern remote video calling capabilities through network connectivity. The system can operate in multiple modes (local only, remote only, or combined), making it adaptable to different scenarios while maintaining a unified interface that doesn't complicate user interaction.
2Reliability
If network-connected interface devices with video and audio capabilities are deployed, then security verification is enhanced, but device complexity and system infrastructure requirements increase
Solution Approach 1:
Tenant profile information including mobile device identifiers and unit assignments is pre-configured in the network server before operation. When a door station initiates a call, the server already has the routing information ready, eliminating the need for complex real-time discovery protocols and reducing the computational complexity of the door station devices themselves.
Solution Approach 2:
The system automatically performs device discovery, tenant identification, and call routing without requiring manual configuration or intervention. The door station automatically detects available tenants in the building and the server autonomously manages the call routing, reducing the operational complexity despite enhanced security capabilities.
3Productivity
If call forwarding to mobile devices is implemented, then remote communication efficiency is improved, but response time monitoring and trigger condition management add system complexity
Solution Approach 1:
The system implements automatic feedback loops where the server monitors call status and tenant response in real-time. When a tenant answers or fails to answer within a timeout period, the server automatically adjusts the call routing accordingly. This feedback mechanism enables efficient call forwarding while keeping the management logic centralized and relatively simple.
Data Source
AI summary
A method for access control of premises having a plurality of units includes receiving a selection of one or more units of the plurality of units associated with the premises from a first user via a primary interface device communicatively coupled to a network. The method also includes sending a call to one or more secondary interface devices based on the selection. The one or more secondary interface devices can be located in the one or more selected units. Further, the method includes monitoring for a trigger condition after the call is sent to the secondary interface device. Upon occurrence of the trigger condition, the method also includes forwarding, via the primary interface device, the call to a mobile device of a second user associated with the one or more units.