Nortel Networks Corporation

James C McLaughlin

James Leslie Watchorn

Gary Michael Depelteau

John Edward Vincent

Tony Huang

Osama Bahgat

Robert Allan Aston

Paul Fong-Yan Hung

The present invention relates to a control device, for use on an electronic circuit board, to perform high-speed data transmission bus entrainment. The control device includes a signal processing component acquiring either one of two modes of operation, specifically a diagnostic mode and a bus entrainment diagnostic mode. When in diagnostic mode, the signal processing component performs a diagnostic procedure on the electronic circuit board. When in bus entrainment mode, the signal processing component performs a bus entrainment procedure.

Method and apparatus for high-speed data transmission bus entrainment

Methods and apparatus are described for translating identifiers that are used by computers to reference various entities such as data structures, external objects, or connections in a telecommunications network, from a bulkier less manageable format to a smaller more manageable format. Such translations are carried out to reduce the needless processing and memory demands that are made of a localized set of components when the large identifiers the set receives from other components include fields that none of the members of the set need to access. The invention is centerd around a two-stage look-up method wherein an inputted external identifier is divided into two parts. The first part of the inputted external identifier is used as an address into a first look-up table that contains base-addresses of a second look-up table. The second part of the inputted external identifier is used as an offset-address into the second look-up table. The offset-address and the base-address are combined to access the second look-up table, which contains all the internal identifiers. The invention can be easily scaled to handle a larger range of external identifiers, and a larger number of internal identifiers. The invention operates at a fast and predictable speed. Use of the invention also leads to a significant savings in memory costs.

Method and apparatus for full range translation of large external identifier to small internal identifier

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Nepean, Canada

James C McLaughlin