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PCE
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DIFF Subgroup
H04Q 3/32

Circuit arrangements for second or subsequent stages of hunting switching

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Selecting arrangements > Circuit arrangements for second or subsequent stages of hunting switching

CPC:

Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Circuit arrangements for second or subsequent stages of hunting switching

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • H04Q 3/34 for the second preselection stage IPC+CPC Available in IPC and CPC
  • H04Q 3/36 for the second line-finder stage IPC+CPC Available in IPC and CPC
  • H04Q 3/38 for stages after the group selector stage IPC+CPC Available in IPC and CPC
  • H04Q 3/40 for stages after the line selector, e.g. for extension selector IPC+CPC Available in IPC and CPC