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IPC Subgroup
H04Q 3/58

Arrangements providing connection between main exchange and sub-exchange or satellite

Introduced: September 1968

Last revised: January 2006

Full Title

Selecting arrangements > Arrangements providing connection between main exchange and sub-exchange or satellite

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
SELECTING

2 direct subcodes

Child Classifications

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  • H04Q 3/6 for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
  • H04Q 3/62 for connecting to private branch exchanges