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:
Jun. 13, 1995
Filed:
Dec. 06, 1993
Alan D Clark, Near Devizes, GB;
Michael N Turner, Ipswich, GB;
British Telecommunications public limited company, London, GB;
Abstract
A data switching node includes a plurality of data lines including high speed data (link) lines and low speed data (port) lines and a switch connected to the data lines. The switch is a distributed multiplexer comprising a number of switching modules connected in common to a data bus. The switching modules are arranged to communicate data with the common data bus. A control module is also connected to the bus and arranged to control the addressing of the switching modules so that data received by a switching module connected to one data line is transmitted directly via the common data bus to a switching module connected to a selected other one of the data lines in response to a control signals from the control module identifying the said switching module, the data being transmitted in association with a logical channel number associated with the switching module connected to the selected other one of the data lines. IN a method of operating a multiplexer particularly suitable for use with the data switching node a plurality of channels are received and transmitted as byte-interleaved frames. Each incoming channel is assigned a logical channel number and written to a byte or bit position of the outgoing data frame selected in accordance with the logical channel number. The outgoing frame is assembled and output substantially coincidentally with the incoming date frame.