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:
Aug. 14, 2001
Filed:
Nov. 24, 1999
Roger L. Koenig, Boulder, CO (US);
S. Christopher Alaimo, Boulder, CO (US);
Thomas E. Bullington, Boulder, CO (US);
Phillip D. Clark, Boulder, CO (US);
Kenneth C. Grobaski, Berthoud, CO (US);
Matthew D. Morris, Boulder, CO (US);
Kirkton I. Shoop, Longmont, CO (US);
Michael A. Trofi, Boulder, CO (US);
Carrier Access Corporation, Boulder, CO (US);
Abstract
A multiplexer for multiplexing and demultiplexing signals between a low-speed network and a higher speed network includes 7 quad DSX-1 cards and 1 spare card. The spare card is connected to the DSX-1 cards to allow the spare card to automatically be switched in for one of the DSX-1 cards or to allow interface electronics on the spare card to replace selected ones of interface electronics on different DSX-1 cards simultaneously. A pair of controller cards, a primary card and a secondary card, perform M1-3 multiplexing and demultiplexing and the DS-3 framing and transceiving. The controller cards can be selected or deselected in a short time period alarms are not set off and so that the transition is hitless by electronically enabling and disabling the transceiver. The multiplexer is connectable to 2 different T-3 links to provide network redundancy. An array of relays connected either controller card to either of the T-3 links. The controller cards are externally connectable to a computer network for external control thereof. The multiplexer is housed within a reduced volume which occupies a single rack unit on a standard vertical rack used for telecommunications equipment due to a dual backplane architecture in which an external backplane serves as the external connector plane while a separate internal backplane serves as the connection to the DSX-1 cards and controller cards.