using static electronic memories, e.g. chips

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 > using static electronic memories, e.g. chips

Classification Context

Section:

ELECTRICITY

Class:

ELECTRIC COMMUNICATION TECHNIQUE

Subclass:

TELEPHONIC COMMUNICATION

Child Classifications

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• H04M 1/27453 Directories allowing storage of additional subscriber data, e.g. metadata
• H04M 1/27467 Methods of retrieving data
• H04M 1/27485 Appending a prefix to or inserting a pause into a dialling sequence
• H04M 1/2749 Automatic dialling or redialling systems, e.g. on off-hook or redial on busy
• H04M 1/27495 implemented by means of discrete electronic components, i.e. neither programmable nor microprocessor-controlled
• H04M 1/275 implemented by means of portable electronic directories
• H04M 1/2753 providing data content