IPC Subgroup
H04M 15/12 Discriminative metering
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for metering, time-control or time-indication > Metering calls from calling party > Discriminative metering
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION
5 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04M 15/14 according to class of calling party
- H04M 15/16 according to connection obtained
- H04M 15/18 according to duration of call
- H04M 15/22 according to time of day
- H04M 15/24 preventing metering of tax-free calls to certain lines, e.g. to fire or ambulance stations