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. 19, 2012
Filed:
Mar. 07, 2008
Qing-guang Liu, Sunnyvale, CA (US);
Wilson OR, Belmont, CA (US);
Long Tran, Milpitas, CA (US);
Victor Mei, Palo Alto, CA (US);
Qing-Guang Liu, Sunnyvale, CA (US);
Wilson Or, Belmont, CA (US);
Long Tran, Milpitas, CA (US);
Victor Mei, Palo Alto, CA (US);
Fortemedia, Inc., Sunnyvale, CA (US);
Maxsonics, Inc., Santa Clara, CA (US);
Abstract
A telephone system comprising an analog telephone and a full-duplex speakerphone adapter is disclosed. The analog telephone comprises an ordinary analog telephone subscriber circuit for transmitting and receiving analog signals and a handset for users. The full-duplex speakerphone adapter is coupled between the analog telephone and a central office, uses a subscriber loop interface circuit through the first telephone line to couple to the ordinary analog telephone subscriber circuit of the analog telephone and uses a telephone hybrid interface circuit through the second telephone line to couple to a wall jack to communicate with the central office.