DIFF Subgroup
H04J 3/02 Details (electronic switching or gating H03K17/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Details
CPC: Details (electronic switching or gating H03K17/00)
Full Title
Full titles differ between systems:
IPC:
Time-division multiplex systems > Details
CPC:
Time-division multiplex systems (H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q) > Details (electronic switching or gating H03K17/00)
Of 7 combined children, 6 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- H04J 3/04 Distributors combined with modulators or demodulators +3 CPC IPC+CPC Available in IPC and CPC
- H04J 3/08 Intermediate station arrangements, e.g. for branching, for tapping-off +1 CPC IPC+CPC Available in IPC and CPC
- H04J 3/12 Arrangements providing for calling or supervisory signals +1 CPC IPC+CPC Available in IPC and CPC