Systems providing special services or facilities to subscribers (specially adapted for wireless communication networks H04W4/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Systems providing special services or facilities to subscribers

CPC: Systems providing special services or facilities to subscribers (specially adapted for wireless communication networks H04W4/00)

Full Title

Full titles differ between systems:

IPC:

Automatic or semi-automatic exchanges > Systems providing special services or facilities to subscribers

CPC:

Automatic or semi-automatic exchanges > Systems providing special services or facilities to subscribers (specially adapted for wireless communication networks H04W4/00)

CPC subdivides this area 2x more granularly than IPC with 17 additional codes.

17 codes are CPC-only extensions.

5 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04M 3/42008 CPC only CPC only
H04M 3/42017 CPC only CPC only
H04M 3/42025 +2 CPC CPC only CPC only
H04M 3/42127 CPC only CPC only
H04M 3/42136 +4 CPC CPC only CPC only
H04M 3/42187 CPC only CPC only
H04M 3/42195 CPC only CPC only
H04M 3/42204 CPC only CPC only
H04M 3/42212 CPC only CPC only
H04M 3/42221 CPC only CPC only
H04M 3/42229 +3 CPC CPC only CPC only
H04M 3/4228 +3 CPC CPC only CPC only
H04M 3/42314 +3 CPC CPC only CPC only
H04M 3/42348 +1 CPC CPC only CPC only
H04M 3/42365 +1 CPC CPC only CPC only
H04M 3/42382 CPC only CPC only
H04M 3/42391 CPC only CPC only
H04M 3/424 Arrangements for automatic redialling (at the subscriber's set H04M1/27) since 2000 IPC+CPC Available in IPC and CPC
H04M 3/428 Arrangements for placing incoming calls on hold since 2000 +5 CPC IPC+CPC Available in IPC and CPC
H04M 3/432 Arrangements for calling a subscriber at a specific time, e.g. morning call service since 2000 IPC+CPC Available in IPC and CPC