Bus networks

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Data switching networks > characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] > Bus networks

CPC:

Data switching networks (interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F13/00) > characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] (wireless communication networks H04W ) > Bus networks

CPC subdivides this area 5x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

Note: 3 CPC extensions are marked as secondary classification only.

IPC defines codes here since 1995.

Child Classifications

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H04L 12/40006 +6 CPC CPC only CPC only
H04L 12/40052 +10 CPC CPC only CPC only
H04L 12/4013 +1 CPC CPC only CPC only
H04L 12/40143 +3 CPC CPC only CPC only
H04L 12/40169 +1 CPC CPC only CPC only
H04L 12/403 with centralised control, e.g. polling since 1995 +1 CPC IPC+CPC Available in IPC and CPC
H04L 12/407 with decentralised control since 1995 IPC+CPC Available in IPC and CPC
H04L 2012/40208 2nd only +7 CPC CPC only CPC only
H04L 2012/4026 2nd only CPC only CPC only
H04L 2012/40267 2nd only +4 CPC CPC only CPC only