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. 15, 1991
Filed:
Dec. 14, 1989
Robert Madge, Giles, GB;
David Woodfield, Walsall, GB;
Madge Networks Limited, , GB;
Abstract
A communications network comprising a hierarchy of communications systems all operating within the constraints of token ring protocols and operationally defining a single shared token ring. At least one of said systems is formed by a token ring hub as disclosed and claimed in our copending application 177,764 and is connected into a system comprising the next higher hierarchal level which may be another such token ring hub or a token ring LAN system. Each said hub has means for receiving a signal which indicates that the standard token ring protocols are satisfied with respect to the direct connection of the hub of a computer having a token ring adapter card fitted, or indicative of such a computer connected to another said hub at a lower level of the hierarchy. Said means transmits a comparable signal to the next system into which the respective hub is connected in hierarchal succession likewise indicative that the token ring protocols are satisfied with respect to the connection of the respective hub into the said next system.