Exchange System Conference Circuit Reduction via Unidirectional Channels
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Solution Overview
Problem
Existing conference systems require multiple conference circuits to support a large number of participants, leading to increased costs due to the need for multiple lines for bidirectional communications.
Innovation Solution
An exchange system with a time-division switch, memory for grouping telephone numbers, and a controller that establishes unidirectional communications between extensions, allowing for efficient use of lines by determining the necessary minimum number of lines for bidirectional communications, thereby reducing the number of conference circuits required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all telephones belonging to the group can communicate with each other in a conference system, then the number of participants in the conference can be increased, but the number of conference circuits must be increased proportionally, leading to increased costs
Solution Approach 1:
The patent segments the conference communication into multiple unidirectional channels instead of requiring full bidirectional communication between all participants. Each participant receives audio from the conference trunk unidirectionally, and only the speaker communicates bidirectionally with the trunk at any given time. This segmentation allows many participants to join without proportionally increasing conference circuits.
Solution Approach 2:
The patent introduces a conference trunk as an intermediary that synthesizes audio from multiple participants. Instead of direct peer-to-peer communication requiring N*(N-1) circuits for N participants, all participants communicate through the centralized trunk, reducing circuit requirements to approximately N circuits while maintaining full conference functionality.
2Ease of operation
If bidirectional communications are established between all extensions in a conference, then full communication capability is achieved, but the number of lines required increases significantly
Solution Approach 1:
The patent implements dynamic communication modes where participants can switch between unidirectional reception and bidirectional speaking/reception. The system dynamically assigns communication roles based on who is currently speaking, allowing full communication capability when needed while minimizing line usage during listening phases. This dynamic approach reduces average line requirements while maintaining operational flexibility.
Data Source
AI summary
An exchange capable of increasing the number of participants in a conference without increasing conference circuits for conference communications. The exchange (2) switches connections either between a line wire (11) and a plurality of extensions (10a) to (10c) or between plural extensions and plural line wires. The exchange (2) comprises: a memory (27) registered with plural telephone numbers grouped; and a controller (26) which is notified of a demand of the conference communications from an extension telephone (3a) connected with the extensions (10a) to (10c), for acquiring other telephone numbers of the same group of the telephone number of the extension telephone (3a) thereby to form a channel for unidirectional communications, and which is notified of a demand from the extension telephone (3a) for bidirectional communications with the telephone selected from the other telephones in the unidirectional communications, for forming a channel so that the unidirectional communications with the telephone of the selected telephone number may be the bidirectional communications.