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. 02, 1998
Filed:
Aug. 14, 1997
Larry Wagner, Oakland, CA (US);
Ralph S Smith, Forest Grove, OR (US);
Daniel R Cox, Eugene, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A transceiver providing simultaneous transfer of control information with voice and data over a public switched telephone network line is disclosed. In a typical system application, the transceiver is coupled to a public switched telephone network (PSTN) via a single telephone line. The transceiver includes logic for generating control information and for combining the control information with voice signals or data signals for transmission and reception through the PSTN using a single telephone line. The present invention provides a PSTN channel having two component subchannels, a main channel and a side channel. The main channel is provided for the transfer of voice signals and data signals at the same time the side channel is transferring control information and/or additional data signals. The control information transferred on the side channel is used primarily for selecting the transfer of either voice signals or data signals on the main channel. By providing a separate and independent side channel for controlling the main channel, the present invention eliminates the inherent delays caused in the prior art design by switching between a voice transfer mode and a data transfer mode using a single channel. The present invention also allows the transfer of data signals on the side channel simultaneously with the transfer of voice signals on the main channel. These advantages are provided by the present invention without redefining the bandwidth of the standard PSTN channel.