Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J1/14, H04J3/12)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Signalling arrangements; Manipulation of signalling currents

CPC: Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J1/14, H04J3/12)

Full Title

Full titles differ between systems:

IPC:

Details of selecting apparatus or arrangements > Electrical details > Signalling arrangements; Manipulation of signalling currents

CPC:

Details of selecting apparatus or arrangements > Electrical details > Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J1/14, H04J3/12)

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

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04Q 1/32 using trains of DC pulses (H04Q1/39 takes precedence) IPC+CPC Available in IPC and CPC
H04Q 1/38 using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors IPC+CPC Available in IPC and CPC
H04Q 1/39 using coded pulse groups since 1980 IPC+CPC Available in IPC and CPC
H04Q 1/40 whereby duration of pulse or interval between two pulses is variable IPC+CPC Available in IPC and CPC
H04Q 1/44 using alternate current (H04Q1/50 takes precedence) IPC+CPC Available in IPC and CPC
H04Q 1/48 Induced-current signalling arrangements IPC+CPC Available in IPC and CPC
H04Q 1/50 Conversion between different kinds of signals IPC+CPC Available in IPC and CPC