Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Introduced: September 1968

Title

Titles differ between systems:

IPC: Semi-automatic systems, i.e. systems in which the numerical selection of the outgoing line is under the control of an operator

CPC: Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Full Title

Full titles differ between systems:

IPC:

Automatic or semi-automatic exchanges > Semi-automatic systems, i.e. systems in which the numerical selection of the outgoing line is under the control of an operator

CPC:

Automatic or semi-automatic exchanges > Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04M 3/62 Keyboard equipment IPC+CPC Available in IPC and CPC
H04M 3/64 Arrangements for signalling the number or class of the calling line to the operator (between operators in inter- exchange working H04M5/18) IPC+CPC Available in IPC and CPC