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:
Jul. 13, 2004
Filed:
Mar. 28, 2000
Applicant:
Inventor:
Stefan Petersson, Frisco, TX (US);
Assignee:
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 1/256 ; H04L 1/266 ; H04B 7/185 ;
U.S. Cl.
CPC ...
H04L 1/256 ; H04L 1/266 ; H04B 7/185 ;
Abstract
Permanent virtual channels are set-up, each broadcasting a select audio tone of a number of audio tones. When a terminal requests a call set-up, the identification of the appropriate permanent virtual channel to which the terminal is to listen, depending on the situation, is transmitted to the terminal from the network control center. The tone generating equipment is located in the network control center.