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Title: Universal null DTE (data terminal equipment)

Abstract

A communication device in the form of data terminal equipment permits two data communication equipments, each having its own master clock and operating at substantially the same nominal clock rate, to communicate with each other in a multi-segment circuit configuration of a general communication network even when phase or frequency errors exist between the two clocks. Data transmitted between communication equipments of two segments of the communication network is buffered. A variable buffer fill circuit is provided to fill the buffer to a selectable extent prior to initiation of data output clocking. Selection switches are provided to select the degree of buffer preload. A dynamic buffer fill circuit may be incorporated for automatically selecting the buffer fill level as a function of the difference in clock frequencies of the two equipments. Controllable alarm circuitry is provided for selectively generating an underflow or an overflow alarm to one or both of the communicating equipments. 5 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
6163967
Patent Number(s):
-US-A7118075
Application Number:
ON: DE89010949
Assignee:
Dept. of Energy SNL; ERA-14-027776; EDB-89-075574
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; COMPUTER NETWORKS; COMMUNICATIONS; EQUIPMENT INTERFACES; DESIGN; COMPUTER ARCHITECTURE; ELECTRONIC CIRCUITS; INVENTIONS; 990220* - Computers, Computerized Models, & Computer Programs- (1987-1989); 990210 - Supercomputers- (1987-1989)

Citation Formats

George, M., Pierson, L.G., and Wilkins, M.E. Universal null DTE (data terminal equipment). United States: N. p., 1987. Web.
George, M., Pierson, L.G., & Wilkins, M.E. Universal null DTE (data terminal equipment). United States.
George, M., Pierson, L.G., and Wilkins, M.E. Mon . "Universal null DTE (data terminal equipment)". United States.
@article{osti_6163967,
title = {Universal null DTE (data terminal equipment)},
author = {George, M. and Pierson, L.G. and Wilkins, M.E.},
abstractNote = {A communication device in the form of data terminal equipment permits two data communication equipments, each having its own master clock and operating at substantially the same nominal clock rate, to communicate with each other in a multi-segment circuit configuration of a general communication network even when phase or frequency errors exist between the two clocks. Data transmitted between communication equipments of two segments of the communication network is buffered. A variable buffer fill circuit is provided to fill the buffer to a selectable extent prior to initiation of data output clocking. Selection switches are provided to select the degree of buffer preload. A dynamic buffer fill circuit may be incorporated for automatically selecting the buffer fill level as a function of the difference in clock frequencies of the two equipments. Controllable alarm circuitry is provided for selectively generating an underflow or an overflow alarm to one or both of the communicating equipments. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {11}
}