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:
Feb. 03, 2004
Filed:
Nov. 22, 2000
Stefan Barkarö, Solna, SE;
Torbjörn Randahl, Nacka, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
To secure an ADSL connection between a first ADSL transceiver ( ) in a central office and a second ADSL transceiver ( ) on a subscriber's premises on a telephone line ( ) between a SLIC ( ) in the central office and a telephone ( ), a request to the SLIC ( ) to apply a ringing signal to the telephone line ( ) is detected. In response to such detection, the first ADSL transceiver ( ) switches from a normal bit rate to a lower bit rate for the ADSL connection, and orders the second ADSL transceiver ( ) to do the same before the ringing signal is applied. In response to an off-hook condition, the lower bit rate is maintained for the ADSL connection. In response to an on-hook condition after the off-hook condition as well as in response to a disappearance of the ringing request without an off-hook condition, the first ADSL transceiver ( ) switches back to the normal bit rate and orders the second ADSL transceiver ( ) to do the same.