Multiplex communications – Wide area network – Packet switching
Patent
1981-10-26
1984-02-28
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04J 312
Patent
active
044344864
ABSTRACT:
A self-switched in-band signaling communication apparatus is disclosed which enables the switching of the signaling mode to the data mode on a single transmission line between a data terminal equipment or data communication equipment and the data port of a satellite communications controller, and the opposite switching from the data mode to the signaling mode under a single control bit. Signaling to and from the data port of the satellite communications controller is carried out using conventional dialing pulses at a signaling rate which is independent of the line data rate. The apparatus provides for the multipoint communication between a plurality of data terminal equipments using a unique multipoint turn-around process which provides a mobile bandwidth capability for the communications system.
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A. Kleitsch, "The Tandem Talents of X.21 and SNA," Data Comm., vol. 10, Mar. 1981, No. 3.
H. C. Folts, "Procedures for Circuit-Switched Service in Synchronous Public Data Networks," IEEE Trans. on Comm., vol. 28, No. 4, (Apr. 1980).
H. V. Bertine, "Physical Level Protocols," IEEE Trans. on Comm., vol. COM-28, No. 4, Apr. 1980.
Barner, Jr. Robert P.
Bensadon Joseph M.
Besseyre Jacques A.
Markey Harold G.
Hoel John E.
IBM Corporation
Olms Douglas W.
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