U-interface matching circuit and method

(54) U-INTERFACE MATCHING CIRCUIT AND METHOD

(75) Inventor: Ki Hyuk An, Kunpo (KR)

(73) Assignee: LG Information & Communications, Ltd., Seoul (KR)

( * ) Notice: Under 35 U.S.C. 154(b), the term of this patent shall be extended for 0 days.

(21) Appl. No.: 09/223,749

(22) Filed: Dec. 31, 1998

(30) Foreign Application Priority Data

Sep. 18, 1998 (KR) 98-38778

(51) Int. CI.7 G06F 13/00

(52) U.S. CI 710/129

(58) Field of Search 710/1, 20, 21,

710/62, 63, 72, 129, 131; 709/238

(56) References Cited

U.S. PATENT DOCUMENTS

4,700,020 * 10/1987 Michels-Krohn et al 178/2 R

4,763,294 * 8/1988 Fong 708/510

4,766,596 * 8/1988 Michels-Krolm et al 714/815

5,133,001 * 7/1992 Bohm 455/464

5,396,552 * 3/1995 Jahn et al 379/396

5,630,163 * 5/1997 Fung et al 710/127

5,729,683 * 3/1998 Le et al 709/237

* cited by examiner

Primary Examiner—Xuan M. Thai

(74) Attorney, Agent, or Firm—Fleshner & Kim, LLP

(57) ABSTRACT

A U-interface matching circuit and matching method is disclosed. The circuit includes a plurality of BRI (Basic Rate Interface) boards implementing a digital subscriber's matching, a control board controlling operating modes of the plurality of BRI boards and an SA (Serial Access)4jus providing an independent data transmission path with regard to the plurality of BRI boards. The method includes a first step identifying mounting locations of a plurality of BRI boards, a second step reading an RX flag area of a first BRI board for data transmission and identifying whether the read RX flag is a flag representing the access complete of the first BRI board, a third step setting the first BRI mode as a write mode and transmitting the data length value and transmission data when the RX flag is a flag representing an access complete of the first BRI board, and a fourth step receiving transmission data of the first BRI board. The method further includes a first step setting a read mode by a control board, a second step reading a TX flag area and identifying whether the read TX flag represents an access complete of the control board, a third step transmitting a data length value and transmission data to the control board when the TX flag is a flag representing an access complete of the control board, and a fourth step receiving the data from the control board.

20 Claims, 7 Drawing Sheets