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. 06, 2004
Filed:
Feb. 18, 2000
Michael J. Moody, McKinney, TX (US);
Magnus G. Karlsson, McKinney, TX (US);
Norayda N. Humphrey, McKinney, TX (US);
Gregory Lee Christison, McKinney, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A Universal Serial Bus (USB) modem ( ) having two operating modes, namely Digital Subscriber Loop (DSL) mode and a voice-band mode, is disclosed. A USB interface device ( ) is coupled to a digital signal processor (DSP) ( ) and contains a shared memory ( ) in which USB endpoints are established for data communication. In the DSL mode, an ATM receive controller ( ) receives each ATM cell from the DSP ( ) and interrogates the ATM cell header to determine the virtual connection to the corresponding cell, and then forwards the payload portion of the ATM cell, but not the ATM cell header. In the voice-band mode, the ATM receive controller ( ) and ATM transmit controller ( ) operate in a simple streaming mode. A host interface controller ( ) is also provided, by way of which facsimile communications are carried out simultaneously with DSL communications, or in separate sessions relative to voice-band data communications.