with provision for storing more than one subscriber number at a time

Introduced: July 1974

Last revised: January 2006

Full Title

Substation equipment, e.g. for use by subscribers > Devices for calling a subscriber > Devices whereby a plurality of signals may be stored simultaneously > with provision for storing more than one subscriber number at a time

Classification Context

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

3 direct subcodes

Child Classifications

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H04M 1/2745 using static electronic memories, e.g. chips
H04M 1/276 using magnetic recording, e.g. on tape
H04M 1/278 using punched cards or tapes