according to duration of call

Introduced: September 1968

Last revised: January 2006

Full Title

Arrangements for metering, time-control or time-indication > Metering calls from calling party > Discriminative metering > according to duration of call

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC COMMUNICATION TECHNIQUE
Subclass:: TELEPHONIC COMMUNICATION

1 direct subcode

Child Classifications

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H04M 15/2 Operator's time recording or indicating arrangements