Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange

Child Classifications

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• H04Q 5/02 with direct connection for all subscribers, i.e. party-line systems (H04Q5/24 takes precedence)
• H04Q 5/18 with indirect connection, i.e. through subordinate switching centre
• H04Q 5/24 for two-party-line systems