DIFF Subgroup
H04M 15/18 according to duration of the call
Introduced: September 1968
Title
Titles differ between systems:
IPC: according to duration of call
CPC: according to duration of the call
Full Title
Full titles differ between systems:
IPC:
Arrangements for metering, time-control or time-indication > Metering calls from calling party > Discriminative metering > according to duration of call
CPC:
Arrangements for metering, time-control or time indication > Metering calls from calling party > Discriminative metering > according to duration of the call
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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