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IPC Main Group
H04J 3/00

Time-division multiplex systems

Introduced: September 1968

Last revised: January 2006

Classification Context

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

Related Keywords

using TIME -division multiplex systems

7 direct subcodes

Child Classifications

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  • H04J 3/16 in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
  • H04J 3/17 in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
  • H04J 3/18 using frequency compression and subsequent expansion of the individual signals
  • H04J 3/2 using resonant transfer
  • H04J 3/22 in which the sources have different rates or codes