Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1983-04-21
1985-04-16
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
375117, 370 48, 370100, H04L 2538, H04L 708
Patent
active
045120269
ABSTRACT:
This invention relates to a method and apparatus for transmitting digital data between data terminals via a telecommunications exchange. Data is transmitted asynchronously between the terminals and the exchange and synchronously within the exchange. Transmitted data and internal exchange signals are differentiated even when they are identical. This is accomplished by using a data frame comprising both an information code and a control code which indicates whether the information code contains data to be transmitted. If the transmitted data is not identical to specific digital codes reserved for internal processing in the exchange, the control code is set to one state and the information code contains the data to be transmitted. If the data is identical to one of the digital codes reserved for the exchange, the control code is set to a second state and prescribed substitute digital data is inserted in the information code portion of the data frame.
REFERENCES:
patent: 3710056 (1973-01-01), Tomozawa
patent: 4049908 (1977-09-01), Knorpp et al.
patent: 4161719 (1979-07-01), Parikh et al.
patent: 4298978 (1981-11-01), Nakamura
Milde Jr. Karl F.
Safourek Benedict V.
Siemens Corporate Research & Support, Inc.
LandOfFree
Data format for asynchronous data transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data format for asynchronous data transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data format for asynchronous data transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1460814