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:
Nov. 15, 1994
Filed:
Jan. 11, 1993
Mark Copley, Colorado Springs, CO (US);
Charles H Whiteside, Colorado Springs, CO (US);
John Fluke Mfg. Co., Everett, WA (US);
Forte Networks, Inc., Colorado Springs, CO (US);
Abstract
A token ring local area network (LAN) testing apparatus is provided. The apparatus includes hardware and software that enables it to determine whether the testing apparatus is able to send frames into the token ring at a correct ring speed. The apparatus includes a conventional network interface card (NIC). The NIC includes two selectable clock signals, with the frequencies of the two clock signals being different. When the NIC is used in transmitting frames into the token ring, one of the two clock signals is selected to accompany the frames. The testing apparatus monitors whether frames and/or tokens are obtained from the token ring using the selected clock signal. If not, the testing apparatus causes the other clock signal to be selected. A determination of proper ring speed is made before a beacon condition occurs that would disrupt normal operation of the token ring.