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PCE
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DIFF Subgroup
H04M 1/667

Preventing unauthorised calls from a telephone set (H04M1/677 takes precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: Preventing unauthorised calls from a telephone set

CPC: Preventing unauthorised calls from a telephone set (H04M1/677 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Substation equipment, e.g. for use by subscribers > with means for preventing unauthorised or fraudulent calling > Preventing unauthorised calls from a telephone set

CPC:

Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > with means for preventing unauthorised or fraudulent calling (verifying user identity or authority in secret or secure digital communications H04L9/32) > Preventing unauthorised calls from a telephone set (H04M1/677 takes precedence)

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

IPC defines codes here since 2000.

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