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:
May. 09, 1989
Filed:
Jun. 18, 1987
J Michael Jarvis, Richmond, VA (US);
Other;
Abstract
A main distribution frame (MDF) board for connecting a plurality of stations to a system or switch, or an intermediate distribution frame (IDF) board for connecting an input cable to an output cable, comprises: sets of barrel connectors to which the stations are wired (in the MDF embodiment) or an input connector for connecting the input cable to the board (in the case of the IDF embodiment); an output connector for connecting the output cable to the board; and a plurality of jacks for interconnecting the barrel connectors or input connector to the output connector. The jacks utilized in this arrangement, and their corresponding plugs, are designed such that, when a plug is not inserted into a jack, odd numbered pins are connected to even numbered pins within the jack. Conversely, when the plug is inserted into the jack, the aforementioned connection is broken. Accordingly, problems occurring in the board wiring between the even numbered pins of a jack and the output connector can be easily bypassed by an unskilled person by inserting one end of a jumper cable into the jack, identifying a further unused jack, and inserting a plug at the other end of the jumper cable into the unused jack.