Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Selecting arrangements > Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

CPC:

Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

IPC and CPC are identically structured here. All 7 subcodes exist in both systems.

Child Classifications

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H04Q 3/44 using revertive control IPC+CPC Available in IPC and CPC
H04Q 3/46 using signals other than revertive impulses IPC+CPC Available in IPC and CPC
H04Q 3/47 using translators IPC+CPC Available in IPC and CPC
H04Q 3/48 using markers IPC+CPC Available in IPC and CPC
H04Q 3/52 using static devices in switching stages, e.g. electronic switching arrangements since 1974 +3 CPC IPC+CPC Available in IPC and CPC
H04Q 3/54 in which the logic circuitry controlling the exchange is centralised +1 CPC IPC+CPC Available in IPC and CPC
H04Q 3/56 in which the control signals are multiplexed since 1974 IPC+CPC Available in IPC and CPC