Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1985-09-17
1987-04-28
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
370 61, 370102, 375118, H04L 704
Patent
active
046619666
ABSTRACT:
Two data equipments are connected by switching equipment which supplies high speed lines for a modified data signal and a stuff control signal. A system clock or system clock derived signal is used in a stuffing pattern generator which generates a stuff control signal for one of the high speed lines. The stuffing pattern generator also controls the read terminal of a first buffer register receiving input data from a first equipment written into the register under the control of a clock generated from the system clock. The output from the first buffer register includes stuffing bits as well as data and the data and stuff signal is fed through a high speed line to a second buffer register. The write terminal of the second buffer register receives the stuff control signal to control input to the register and causes deletion of the stuff bits. The read terminal of the second buffer register is under control of the clock derived from the system clock to control the register output to the second equipment.
REFERENCES:
patent: 3420956 (1969-01-01), Heightley et al.
patent: 4053715 (1977-10-01), Drapkin
patent: 4086436 (1978-04-01), Cohen et al.
patent: 4424473 (1980-09-01), Kaul et al.
"Transmission Systems for Communications", Fourth Edition: Bell Telephone Laboratories, Inc., Feb., 1970, (pp. 608 through 621 of Chapter 26-Digital Multiplexers.
"Digital Transmission Systems", IEE Telecommunications Series 4; Revised 2nd Edition: P. Bylanski & D. G. W. Ingram, 1978.
Safourek Benedict V.
T-Bar Incorporated
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