Arrangements for metering, time-control or time indication

Introduced: September 1968

Title

Titles differ between systems:

IPC: Arrangements for metering, time-control or time-indication

CPC: Arrangements for metering, time-control or time indication

Full titles differ between systems:

IPC:

Arrangements for metering, time-control or time-indication

CPC:

Arrangements for metering, time-control or time indication

CPC subdivides this area 5x more granularly than IPC with 39 additional codes.

39 codes are CPC-only extensions, 1 exist only in IPC.

5 shared codes have differing titles between IPC and CPC.

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H04M 15/02 Severing connection after a predetermined time IPC only IPC only
H04M 15/04 Recording calls in printed, perforated or other permanent form IPC+CPC Available in IPC and CPC
H04M 15/07 CPC only CPC only
H04M 15/08 Metering calls to called party IPC+CPC Available in IPC and CPC
H04M 15/09 CPC only CPC only
H04M 15/10 Metering calls from calling party IPC+CPC Available in IPC and CPC
H04M 15/28 with meter at substation IPC+CPC Available in IPC and CPC
H04M 15/31 CPC only CPC only
H04M 15/32 metering arrangements for satellites or concentrators which connect one or more exchange lines with a group of local lines IPC+CPC Available in IPC and CPC
H04M 15/34 metering arrangements for private branch exchanges IPC+CPC Available in IPC and CPC
H04M 15/36 metering arrangements for party-lines IPC+CPC Available in IPC and CPC
H04M 15/38 metering by apparatus other than mechanical step-by-step counter type IPC+CPC Available in IPC and CPC
H04M 15/39 CPC only CPC only
H04M 15/41 CPC only CPC only
H04M 15/42 CPC only CPC only
H04M 15/43 CPC only CPC only
H04M 15/44 CPC only CPC only
H04M 15/46 CPC only CPC only
H04M 15/47 CPC only CPC only
H04M 15/48 CPC only CPC only