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

Introduced: September 1968

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04Q 5/02 with direct connection for all subscribers, i.e. party-line systems (H04Q5/24 takes precedence) IPC+CPC Available in IPC and CPC
H04Q 5/18 with indirect connection, i.e. through subordinate switching centre IPC+CPC Available in IPC and CPC
H04Q 5/24 for two-party-line systems +1 CPC IPC+CPC Available in IPC and CPC