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IPC Subgroup
H04Q 3/04

Circuit arrangements for receivers of routing digits

Introduced: September 1968

Last revised: January 2006

Full Title

Selecting arrangements > Circuit arrangements for receivers of routing digits

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
SELECTING

6 direct subcodes

Child Classifications

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  • H04Q 3/06 for group or trunk group selectors
  • H04Q 3/08 for local or long-distance selectors
  • H04Q 3/1 for PBX selectors, i.e. private branch exchange selectors
  • H04Q 3/12 for line selectors providing transfer of routing digits
  • H04Q 3/14 for two-way operation selectors
  • H04Q 3/16 for marking-switches