Abstract: A method is disclosed for interconnecting an MS-SP ring network and an SNCP ring network in a Dual Node and Bridge and Switch architecture through a primary interconnection node and a secondary interconnection node connected by an optical fiber span, said primary interconnection node comprising means for carrying out a Drop and Continue operation and a service selector for each circuit. The architecture provides for closing said SNCP ring network through the service selector of the primary node of the MS-SP ring network. In this way the management of the selectors is simplified, less I/O interfaces as well as less optical fiber are used and the available band is better exploited.

Abstract: A switch matrix among tributaries of a telecommunication network operating on flows of data which are arranged according to SDH protocol, said switch matrix comprising a set of parallel branches, each of said branches comprising at least a space stage able to select and pack from the input data flow a subset of data to be exchanged, a second time stage able to store the data subset to be exchanged and comprising a random access memory device associated with a write memory and a read memory, said write memory and read memory being driven by a microprocessor and a master counter. The invention is characterized in that the read memory and write memory of each random access memory device are updated in association with a spare read memory which is common to read memories on all branches in parallel and with a spare write memory which is common to write memories on all branches in parallel, respectively.

Abstract: A device for detecting misconnections and/or measuring the misconnection time in telecommunication networks, specifically in MS-SPRING fiber optic telecommunication networks. The device includes pattern generator/checker transmitter blocks for generating sequence of test words designed to be connected with inlets of the telecommunication network and capable of inserting at the inlets, test words which are characteristics of the inlet where they are introduced, as well as detecting blocks designed to be connected with outlets of the telecommunication network and capable of recognizing the incoming test words and the inlet, which they come from.

Abstract: A device for testing the operation of communication networks, specifically MS-SPRING optical fiber communication networks, which includes a traffic protection function. Modulation and measurement elements (A, BK, CHKR, CHKT) are provided, which elements can be driven by a processor (PC) to execute automatic test of the operation of the traffic protection function (12) for one or more rings; (1, 11) of the optical fiber communication network.

Abstract: An event simulator for telecommunication networks and a method for simulating the operation of such a network, in particular an MS-SPRING-type optical fiber telecommunication networks. The event simulator according to the present invention comprises a set of network elements, whose operation has to be tested, and event simulation means. According to the invention, said event simulation means comprise electronic processing means suitable to generate simulation signals for a virtual telecommunication network ring and interfacing means able to transmit/receive said simulation signals with the set of network elements whose operation has to be tested.