Time-division multiplex systems (H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q)

Child Classifications

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• H04J 3/02 Details (electronic switching or gating H03K17/00)
• 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 (H04J3/17, H04J3/24 take precedence)
• 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 3/20 using resonant transfer
• H04J 3/22 in which the sources have different rates or codes
• H04J 3/24 in which the allocation is indicated by an address (H04J3/17 takes precedence; in computers G06F12/00, G06F13/00 )