The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 1986
Filed:
May. 09, 1983
Charles R Baugh, Plantation, FL (US);
Edwin J Hilpert, Plantation, FL (US);
George R Kushin, Hollywood, FL (US);
Yoon B Park, Miami, FL (US);
William A Dambrackas, Miami, FL (US);
Racal Data Communications Inc., Sunrise, FL (US);
Abstract
In a data communication system involving modems transmitting over a link including terrestrial and one or more satellite links, a nontransmitting modem sends a secondary channel tone during the absence of data transmission. The cessation of said tone is detected by the other modem and used to de-squelch the remote modem receiver. In this manner, the receiver is protected from echoes impinging upon it during long transmission delay times. This method optimizes data throughput by adapting to the transmission delay of the circuit.