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ITU-T Recommendation G.783 "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks" defines a library of basic building blocks and a set of rules by which they may be combined in order to describe a digital transmission equipment. The library comprises the functional building blocks needed to specify completely the generic functional structure of the Synchronous Digital Hierarchy. In order to be compliant with this Recommendation, equipment needs to be describable as an interconnection of a subset of these functional blocks contained within this Recommendation. The interconnections of these blocks should obey the combination rules given.

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  • G.783 (es)
  • G.783 (en)
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  • ITU-T Recommendation G.783 "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks" defines a library of basic building blocks and a set of rules by which they may be combined in order to describe a digital transmission equipment. The library comprises the functional building blocks needed to specify completely the generic functional structure of the Synchronous Digital Hierarchy. In order to be compliant with this Recommendation, equipment needs to be describable as an interconnection of a subset of these functional blocks contained within this Recommendation. The interconnections of these blocks should obey the combination rules given. (en)
  • La recomendación G.783 del ITU-T llamada "Características de jerarquía digital síncrona (SDH) equipamiento los bloques funcionales" define una biblioteca de bloques de edificio básico y un conjunto de reglas para que estos puedan ser combinados para describir un equipamiento de transmisión digital.​ La biblioteca comprende los bloques de edificio funcionales necesitaron especificar completamente la estructura funcional genérica de la Jerarquía Digital Síncrona. Para cumplir con esta recomendación, el equipo necesita ser descriptible como una interconexión de un subconjunto de estos bloques funcionales contenidos dentro de la recomendación. Las interconexiones de estos bloques tendrían que obedecer la combinación de reglas dadas. (es)
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  • La recomendación G.783 del ITU-T llamada "Características de jerarquía digital síncrona (SDH) equipamiento los bloques funcionales" define una biblioteca de bloques de edificio básico y un conjunto de reglas para que estos puedan ser combinados para describir un equipamiento de transmisión digital.​ La biblioteca comprende los bloques de edificio funcionales necesitaron especificar completamente la estructura funcional genérica de la Jerarquía Digital Síncrona. Para cumplir con esta recomendación, el equipo necesita ser descriptible como una interconexión de un subconjunto de estos bloques funcionales contenidos dentro de la recomendación. Las interconexiones de estos bloques tendrían que obedecer la combinación de reglas dadas. Esta recomendación define los componentes y la metodología que tendría que ser utilizado para especificar el procesamiento SDH; no define un individual equipamiento SDH como tal. El método de especificación está basado en descomposición funcional del equipamiento a funciones atómicas y compuestas. El equipamiento es entonces descrito por su Equipamiento Especificación Funcional (EFS) el cual lista las funciones atómicas y compuestas, su interconexión, y cualquier otro objetivo de rendimiento globale (p. ej., retraso de transferencia, disponibilidad, etc.). La estructura interna de la implementación de esta funcionalidad (diseño de equipamiento) no necesita ser idéntico a la estructura del modelo funcional, mientras todos los detalles del comportamiento externamente observables cumplan con el EFS. La funcionalidad de equipamiento es compatible con estructura SDH dada en ITU-T G de Recomendación.G.707/Y.1322. (es)
  • ITU-T Recommendation G.783 "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks" defines a library of basic building blocks and a set of rules by which they may be combined in order to describe a digital transmission equipment. The library comprises the functional building blocks needed to specify completely the generic functional structure of the Synchronous Digital Hierarchy. In order to be compliant with this Recommendation, equipment needs to be describable as an interconnection of a subset of these functional blocks contained within this Recommendation. The interconnections of these blocks should obey the combination rules given. This Recommendation defines both the components and the methodology that should be used in order to specify SDH processing; it does not define an individual SDH equipment as such. The specification method is based on functional decomposition of the equipment into atomic and compound functions. The equipment is then described by its Equipment Functional Specification (EFS) which lists the constituent atomic and compound functions, their interconnection, and any overall performance objectives (e.g., transfer delay, availability, etc.). The internal structure of the implementation of this functionality (equipment design) need not be identical to the structure of the functional model, as long as all the details of the externally observable behavior comply with the EFS. The equipment functionality is consistent with the SDH multiplexing structure given in ITU-T Recommendation G.707/Y.1322. (en)
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