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Title: Universal null DTE

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.

Inventors:
 [1];  [1];  [1]
  1. (Albuquerque, NM)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
867012
Patent Number(s):
4841550
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
universal; dte; communication; device; form; data; terminal; equipment; permits; equipments; master; clock; operating; substantially; nominal; rate; communicate; multi-segment; circuit; configuration; network; phase; frequency; errors; exist; clocks; transmitted; segments; buffered; variable; buffer; fill; provided; selectable; extent; prior; initiation; output; clocking; selection; switches; select; degree; preload; dynamic; incorporated; automatically; selecting; level; function; difference; frequencies; controllable; alarm; circuitry; selectively; generating; underflow; overflow; communicating; data output; communication network; data communication; automatically selecting; clock rate; communication device; master clock; /375/370/

Citation Formats

George, Michael, Pierson, Lyndon G., and Wilkins, Mark E. Universal null DTE. United States: N. p., 1989. Web.
George, Michael, Pierson, Lyndon G., & Wilkins, Mark E. Universal null DTE. United States.
George, Michael, Pierson, Lyndon G., and Wilkins, Mark E. Sun . "Universal null DTE". United States. https://www.osti.gov/servlets/purl/867012.
@article{osti_867012,
title = {Universal null DTE},
author = {George, Michael and Pierson, Lyndon G. and Wilkins, Mark 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

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