SYNCHRONOUS TELECOMMUNICATIONS EQUIPMENT WITH A MECHANISM FOR THE SYNCHRONISATION OF REDUNDANT CLOCK PULSES

ENCAPSULATION OF SCREENS STM-N/STS-M UNDER ETHERNET

Un dispositif (D1) est dédié au traitement de trames de données de type STM-n/STS-m au sein d'un réseau de communication. Ce dispositif (D1) comprend au moins une interface de lignes STM-n/STS-m (LIU1), propre à recevoir des trames de données de type STM-n/STS-m d'un réseau de communication, et des moyens de traitement (MT) chargés, lorsqu'ils reçoivent d'une interface (LIU1) des données d'une trame STM-n/STS-m, i) de segmenter cette trame en m groupes de p octets successifs, puis ii) d'associer à chaque groupe un entête de contrôle comprenant des données représentatives de leur position au sein de la trame STM-n/STS-m, et iii) d'encapsuler chaque groupe et l'entête de contrôle associé dans un champ de données utiles d'une trame Ethernet.

DEVICE OF SYNCHRONIZATION HAS REDUNDANCY OF CLOCK SIGNALS, FOR UNEQUIPEMENT Of a SYNCHRONOUS GRID SYSTEM

Un dispositif de synchronisation (D), pour un équipement d'un réseau de transport synchrone, comprend, d'une part, un premier module de synchronisation (MA) comportant i) un premier sous-module (SM1A) délivrant un premier signal d'horloge intermédiaire issu d'un premier signal d'horloge de référence externe ou d'un signal d'horloge de référence interne, ii) un deuxième sous-module (SM2A) délivrant un premier signal d'horloge de référence, dit principal, issu du premier signal d'horloge intermédiaire ou d'un second signal d'horloge intermédiaire, et iii) un troisième sous-module (SM3A) délivrant un premier signal d'horloge de référence, dit de sortie, issu du premier signal principal ou d'un second signal principal, et d'autre part, un second module de synchronisation (MB) comportant i) un premier sous-module (SM1B) délivrant le second signal d'horloge intermédiaire issu d'un autre premier signal d'horloge de référence externe et d'un autre signal d'horloge de référence interne, ii) un deuxième sous-module (SM2B) délivrant le second signal principal issu du second ou du premier signal d'horloge intermédiaire, et iii) un troisième sous-module (SM3B) délivrant un second signal d'horloge de référence, dit de sortie, issu du second ou du premier signal principal. A synchronization device (D), for an equipment of a synchronous transport network, comprises, on the one hand, a first synchronization module (MA) comprising i) a first sub-module (SM1A) delivering a first signal of intermediate clock derived from a first external reference clock signal or an internal reference clock signal, ii) a second submodule (SM2A) delivering a first reference clock signal, called the main clock, from the first intermediate clock signal or a second intermediate clock signal, and iii) a third submodule (SM3A) delivering a first reference clock signal, said output signal, from the first main signal or a ...

Switching apparatus having universal transport of data packet frames

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 ...

A PACKAGING OF STM N/STS M FRAMEWORK IN ETHERNET

Synchrones Telekommunikationsgerät mit einer Einrichtung zur Synchronisation redundanter Taktsignale

Einkapselung von STM-n/STS-m Rahmen in Ethernet

SYNCHRONIZATION DEVICE HAS REDUNDANT CLOCK SIGNALS, FOR AN EQUIPMENT OF A SYNCHRONOUS TRANSMISSION NETWORK

Synchrones Telekommunikationsgerät mit einer Einrichtung zur Synchronisation redundanter Taktsignale

SWITCHING APPARATUS HAVING UNIVERSAL TRANSPORT OF DATA PACKET FRAMES

Apparatus (A) is dedicated to switching data packet frames of different types coming from at least two transport networks (N 1 , N 2 ) that use different transport protocol layers. Said apparatus (A) comprises a switching module (SM) and at least two access cards (AC 1 , AC 2 ), each of which is connected to a respective one of said networks and to said switching module, each access card including processing means (PM) that, when they receive a frame coming from a source network (N 1 ) to which they are connected and for a destination network (N 2 ), 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 (SM), said internal header comprising at least: i) a channel identifier field containing a value representative of a channel assigned to the connection used by said frame on being set up; ii) a length field ...

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

Apparatus (D1) 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 (LIU1) 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 (LIU1): i) to segment the whole of said received frame into m groups of p successive 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

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

A synchronization system (D) for equipment of a synchronous transport network comprises, firstly, a first synchronization module (MA) comprising i) a first submodule (SM1A) delivering a first intermediate clock signal derived from a first external reference clock signal or an internal reference clock signal, ii) a second submodule (SM2A) 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 (SM3A) 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 (SM1B) delivering the second intermediate clock signal derived from another first external reference clock signal and another internal reference clock signal, ii) a second submodule (SM2B) delivering the second main reference clock signal derived from the first or the ...

Einkapselung von stm-n/sts-m rahmen in ethernet

Synchrones telekommunikationsgerät mit einer einrichtung zur synchronisation redundanter taktsignale