Multiplex communications – Wide area network – Packet switching
Patent
1994-07-12
1996-01-30
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701051, 370112, 379 93, 371 30, 371 471, H04J 302
Patent
active
054886104
ABSTRACT:
The present invention concerns a multiplexer for use in a system for transmitting more than one type of data, e.g. a system for transmitting voice and data. The invention eliminates transmission errors in framed data due to clock errors on the transmission side by appropriate choice of the length of multiplexer frames. Two embodiments are disclosed, one in which the frame rate of the multiplexer is greater than the frame rate of a voice coder and another in which the length of multiplexer frames is slightly adjustable to account for clock errors.
REFERENCES:
patent: 5214650 (1993-05-01), Renner et al.
patent: 5331670 (1994-07-01), Sorbara et al.
Patent Abstracts of Japan, vol. 01, No. 3181 (E-750) 27 Apr. 1989 & JP-A-10 007 738 (K.D.D. Co Ltd).
Proceeding IEEE International Symposium on Subscriber Loops and Services 20 Mar. 1978, Atlanta (US)--pp. 126-130.
Kaiser et al. `Digital two-wire local connection providing office subscribers with speech, data and new teleinformation services.`--p. 129, column 2, line 37--p. 130, column 1, line 18.
I.B.M. Technical Disclosure Bulletin vol. 15, No. 8, 1 Jan. 1973, pp. 2527-2528--J. Besseyre `Self timing framing in a digital telephone system`.
Blum Russell W.
Hewlett--Packard Company
Olms Douglas W.
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