Method of managing different type multiple failures in ring topology telecommunication networks

摘要

Described is a method of managing multiple failures of different type in telecommunication networks having a ring topology, in particular transoceanic four-fiber MS-SPRING rings. The method is characterized by comprising the step, implemented before realizing the ring type protection, of checking that the necessary low priority channels for the implementation of the ring type protection are available, namely they are not already utilized for performing another protection; in the negative case, it is foreseen the implementation of no ring type protection to prevent the unuseful loss of low priority channels. In case of multiple failures of different type, namely of ring and span types, in the path, the method provides for implementing a ring type protection.