System for cross-connecting high speed digital sonet signals

Details System for cross-connecting high speed digital sonet signals System for cross-connecting high speed digital sonet signals

H - Electricity

04

B

H04B 10/20 (2006.01) H04Q 3/52 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2113540

A modular, expandable, non-blocking system for cross-connecting high speed digital signals is provided. The system is capable of connecting DSn, CEPTn, and STSn signals as desired, with lower rate signals being included as components of the high-rate signals or terminating on low speed lines, as desired. The system accomplishes its goals by converting all incoming signals into a substantially SONET format, and by processing all the signals in that format. The signals are typically cross-connected in the substantially SONET format, although an expandable non-blocking wide band cross-connect module provided which cross-connects any like signals. If the outgoing signal is to be in other than SONET format, the substantially SONET formatted signal is reconverted into its outgoing format, To create a complete system, various modules are utilized, including: add/drop multiplexer means for add/drop applications of DS-0, DS-1, CEPTn signals, etc.; a SONET bus interface; a virtual tributary cross-connect module which cross-connects virtual tributary payloads in space, time, and phase to generate new substantially SONET formatted signals; a wide band cross-connect module; a DS-3/SONET converter; and front end interfaces including a DS-3 line interface, and various STSn interfaces. The modules may be mixed and matched as desired to accommodate a multitude of applications.

Un système modulaire, extensible et sans blocage pour l'interconnexion de signaux numériques rapides est fourni. Le système est en mesure d'interconnecter des signaux DSn, CEPTn et STSn, les signaux lents étant intégrés à des composantes des signaux rapides, ou raccordés à des lignes lentes. Le système accomplit sa fonction en convertissant tous les signaux d'arrivée dans un format quasi-SONET, puis en traitant tous les signaux dans ce format. En général, les signaux sont interconnectés dans le format quasi-SONET, bien qu'un module d'interconnexion extensible, sans blocage et large bande soit fourni pour permettre d'interconnecter n'importe quels signaux semblables. Lorsque le signal de départ doit être dans un autre format que le format SONET, le signal au format quasi-SONET est reconverti dans son format de départ. Pour créer un système complet, divers modules sont utilisés, notamment : un multiplexeur pour l'ajout ou la suppression d'applications de signaux DS-0, DS-1, CEPTn, etc.; une interface bus SONET; un module pour l'interconnexion de charges utiles tributaires virtuelles (temps, espace et phase) pour la génération de nouveaux signaux au format quasi-SONET; un module d'interconnexion large bande; un convertisseur DS-3/SONET; et des interfaces frontales, y compris une interface de ligne DS-3 et diverses interfaces STSn. Les modules peuvent être combinés en vue d'une multitude d'applications.

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