Alcatel

Alcatel Lucent

Philippe Dollo

Yannick Stephan

Benoit Morin

Apparatus (D) is dedicated to processing STM-n/STS-m type data frames in a communications network. It comprises at least one STM-n/STS-m interface unit (LIU) adapted to receive STM-n/STS-m type data frames from a communications network and processor means (MTj) adapted, on receiving data from an STM-n/STS-m frame coming from said line interface unit (LIU): i) to segment the whole of said received frame intogroups ofsuccessive bytes; ii) then to associate with each group a control header containing data representing its position within the STM-n/STS-m frame; and iii) to encapsulate each group and the associated control header in a payload data field of an Ethernet frame.

Encapsulation of STM-n/STS-m frames under ethernet

Apparatus is dedicated to switching data packet frames of different types coming from at least two transport networks that use different transport protocol layers. Said apparatus includes a switching module and at least two access cards, each of which is connected to a respective one of said networks and to said switching module, each access card including processing means that, when they receive a frame coming from a source network to which they are connected and for a destination network, have the tasks of removing from said frame the transport protocol layers that it contains, and then of adding an internal header to the payload data of at least one packet of said frame, prior to transmitting it to said switching module, said internal header comprising at least: a channel identifier field containing a value representative of a channel assigned to the connection used by said frame on being set up; a length field containing a value representative of the number of bytes contained in the packet in question; and a type field containing values representative of characteristics of the payload data of the packet in question.

Switching apparatus having universal transport of data packet frames

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.

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Lannion, France

Philippe Dollo