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. 20, 2001
Filed:
Oct. 21, 1997
Eric P. Mitchell, Vancouver, WA (US);
Connie D. York, Riverton, UT (US);
Patrick A. Tucker, Sandy, UT (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A method and apparatus for discerning between unknown but standardized ISDN interfaces, such as the U and S/T reference points, and automatically selecting compatible routing for the respective interface to compatible ISDN equipment. An unknown reference point supported by an ISDN service provider is interfaced with a reference adaptor comprised of an interface selection circuit which discerns the standardized form of the unknown reference point presented by the service provider and appropriately switches a relay means for routing the unknown interface reference point to ISDN equipment, either directly or indirectly through a transformation NT-1 device. Protection circuitry prevents signals from one reference interface from damaging sensitive circuitry of another reference interface.