Multiplex communications – Wide area network – Packet switching
Patent
1982-08-23
1985-03-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701101, H04J 316
Patent
active
045063591
ABSTRACT:
TASI apparatus suitable for use with telephone networks employing interregister multifrequency signalling comprising transmission apparatus at a first end of a transmission trunk link having a first plurality of communication channels, the transmission apparatus including means for detecting signals on a second plurality of telephone communication lines on which signals are present to an available one of the first plurality of communication channels and means for applying a delay to the detected signals, receiving apparatus at a second end of the transmission link including means for assigning each of the first plurality of communication channels carrying signals to a corresponding one of the second plurality of telephone communication lines in accordance with assignment information received from the transmission apparatus, means for communicating messages including assignment information between the transmission apparatus and the receiving apparatus, means for sensing the onset of interregister multifrequency signalling on the second plurality of telephone communication lines, and means for disabling the means for applying a delay to the detected signals in response to the sensed onset of interregister multifrequency signalling.
REFERENCES:
patent: 3046347 (1962-07-01), Miedema
patent: 3721767 (1973-03-01), LaMarche et al.
patent: 4153816 (1979-05-01), Morgan
Henquin Teodor
Zeev Ya'acov B.
Electronics Corporation of Israel Ltd.
Olms Douglas W.
Scutch III Frank M.
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