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PCE
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DIFF Subgroup
H04M 5/18

Arrangements for signalling the class or number of called or calling line from one exchange to another

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Manual exchanges > Arrangements for signalling the class or number of called or calling line from one exchange to another

CPC:

Manual exchanges (substation equipment in general H04M1/00) > Arrangements for signalling the class or number of called or calling line from one exchange to another

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • H04M 5/20 Arrangements for indicating the numbers of the incoming lines IPC+CPC Available in IPC and CPC