Alcatel

Alcatel-Lucent USA Inc.

Benoit Morin

Charles Calvin Byers

Philippe Dollo

Yannick Stephan

Christian Joncourt

A synchronization system (D) for equipment of a synchronous transport network comprises, firstly, a first synchronization module (MA) comprising i) a first submodule (SMA) delivering a first intermediate clock signal derived from a first external reference clock signal or an internal reference clock signal, ii) a second submodule (SMA) delivering a first main reference clock signal derived from the first intermediate clock signal or a second intermediate clock signal, and iii) a third submodule (SMA) delivering a first output reference clock signal derived from the first main reference clock signal or a second main reference clock signal, and, secondly, a second synchronization module (MB) comprising i) a first submodule (SMB) delivering the second intermediate clock signal derived from another first external reference clock signal and another internal reference clock signal, ii) a second submodule (SMB) delivering the second main reference clock signal derived from the first or the second intermediate clock signal, and iii) a third submodule (SMB) delivering a second output reference clock signal derived from the first or the second main reference clock signal.

Synchronization system using redundant clock signals for equipment of a synchronous transport network

Provided is an apparatus and a system. The apparatus, in one embodiment, includes a chassis having one or more slots configured to hold circuit boards and a plenum coupled to the chassis. The apparatus, in this embodiment, further includes a fan assembly coupled to the plenum and configured to provide an airflow therethrough, and servo dampers associated with the one or more slots and configured to allocate a portion of the airflow to associated air paths.

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Perros-Guirec, France

Benoit Morin