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:
Jan. 14, 2003
Filed:
Mar. 26, 1999
Nobuyuki Yasuda, Tokyo, JP;
Nec Corporation, Tokyo, JP;
Abstract
An integrated services digital network (ISDN) terminal adapter comprises: a terminal adapter board within a personal computer (PC), the terminal adapter (TA) board including a digital signal processor (DSP) for carrying out modulation-demodulation of a modem and data processing for ISDN and a dial access arrangement (DAA) utilizing DSP as a modem function; and a digital service unit (DSU) outside the PC, employing a plurality of analog port interfaces and a plurality of S/T interfaces, the analog port interface and the S/T interface being connected to the TA board and, in addition, performing interfacing with the U point of an ISDN circuit, where various functions of the DSU analog port interface re controlled by a tone generation function of the TA board through a telephony application interface (TAPI) between a communication application and an operating system (OS).