Security Device Session Address Mapping for Teleworking
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Solution Overview
Problem
The construction of a network environment for teleworking is hindered by the complexity of settings required for devices, making it difficult for those without expertise to establish an environment similar to an office key telephone system.
Innovation Solution
A security device connected to a router at the boundary between a WAN and LAN, and to a main device of a key telephone system, which acquires IP addresses, forms session-establishment address correspondence, and sets address information units to facilitate session establishment and voice packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a security device is installed to ensure adequate security for teleworking network environment, then security is improved, but device complexity and difficulty of setup increase
Solution Approach 1:
The security device performs self-configuration by automatically acquiring IP addresses, forming session-establishment address correspondence, and setting address information units without requiring manual intervention. This self-service capability reduces setup complexity while maintaining security functions.
Solution Approach 2:
The security device acts as an intermediary between the router and the key telephone system, automatically managing address correspondence and session establishment. This intermediary role simplifies the overall system complexity by centralizing the configuration management in a single device that handles security and address mapping automatically.
2Adaptability or versatility
If multiple devices (router, security device, key telephone system) are connected to establish teleworking environment, then functionality is improved, but ease of operation deteriorates due to numerous settings required
Solution Approach 1:
The security device automatically acquires necessary IP addresses from the router, forms session-establishment address correspondence, and configures address information units without requiring user intervention. This self-service approach maintains the multi-device functionality while eliminating the need for users to perform complex settings.
Solution Approach 2:
The security device performs preliminary configuration actions by pre-establishing address correspondence and setting address information units before teleworking sessions begin. This preliminary action ensures that all necessary settings are automatically in place, improving ease of operation while maintaining full functionality.
3Ease of operation
If session-establishment address correspondence is automatically formed, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The security device serves as an intermediary that automatically forms session-establishment address correspondence between the router and key telephone system. By centralizing this complex address mapping function in a single intermediary device, the system improves ease of operation while concentrating the complexity in one component rather than distributing it across multiple devices.
Data Source
AI summary
An address correspondence formation unit in a security device forms session-establishment address correspondence that associates a first type external address information unit of a main device, a first type external address information unit of the security device containing an IP address of the security device on a router side and a session establishment port number for a connection target telephone on a WAN side, and a terminal number and a session-establishment address information unit of the connection target telephone. The first type external address information unit of the main device contains an IP address and a session establishment port number of the main device. A setting control unit sets, to the main device, the first type external address information unit of the main device and a first type internal address information unit of the security device.