H - Electricity – 04 – B
Patent
H - Electricity
04
B
340/72
H04B 15/00 (2006.01)
Patent
CA 1249644
-11- METHOD AND APPARATUS FOR MAXIMIZING EFFICIENCY IN SATELLITE COMMUNICATIONS ABSTRACT OF THE DISCLOSURE In a data communication system involving modems transmitting over a link including terrestrial and one or more satellite links, a nontransmitting modern 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.
485963
Baugh Charles R.
Dambrackas William A.
Hilpert Edwin J.
Kushin George R.
Park Yoon B.
Gowling Lafleur Henderson Llp
Racal Data Communications Inc.
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