CPC Main Group
H04Q 3/00 Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence)
14 direct subcodes
Child Classifications
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- H04Q 3/02 Circuit arrangements for selectors responsive to a permutation code
- H04Q 3/04 Circuit arrangements for receivers of routing digits
- H04Q 3/18 Circuit arrangements for first stage of hunting switching
- H04Q 3/32 Circuit arrangements for second or subsequent stages of hunting switching
- H04Q 3/42 Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
- H04Q 3/58 Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q 3/64 Distributing or queueing
- H04Q 3/70 Identification of class of calling subscriber
- H04Q 3/72 Finding out and indicating number of calling subscriber
- H04Q 3/76 Translation from the called subscriber's number to the outgoing or incoming control information
- H04Q 3/78 Temporary storage of information of calling or called subscriber (intermediate storage means for telegraphic communication H04L13/08)