Abstract: A method for activation of circuits in telecommunications networks comprises a first step in which circuits are preplanned in the network and local definition data are distributed to network members (NE) for connection of sections of the preplanned circuits. In a second step, when it is desired to activate a preplanned circuit, activation messages for the connection of sections making up the preplanned circuit to be activated and which are defined by the data previously distributed to the network members are propagated in the network in cascade among the network members affected by the preplanned circuit by means of overhead bytes of the frames circulating in the network. The data are made up of indexed tables defining pairs formed from “next point (TP) to be connected” and “index” to be propagated for the following cross-connection. A network functioning in accordance with the method is also proposed.

Abstract: A method is described for identification in a communication network of a sequence of circuit movement steps therein to change with the movement of a single circuit at a time from an initial routing in which are satisfied a certain number of service demands to a feasible target routing that satisfies the same service demands with better utilization of the network resources and that is identified as the one which best approximates or identifies a new predetermined desired target routing. In accordance with the method the steps are made of calculating for each demand still to be processed a replacement circuit reducing the cost difference with the circuit that satisfies the same demand in the desired target routing, choosing from among all the calculated replacement circuits the one having less cost and replacing it, marking the corresponding demand as processed, and repeating the steps from the beginning until all the demands have been processed.

Abstract: A method is described for identification in a communication network of a sequence of circuit movement steps therein to change with the movement of a single circuit at a time from an initial routing in which are satisfied a certain number of service demands to a feasible target routing that satisfies the same service demands with better utilization of the network resources and that is identified as the one which best approximates or identifies a new predetermined desired target routing. In accordance with the method the steps are made of calculating for each demand still to be processed a replacement circuit reducing the cost difference with the circuit that satisfies the same demand in the desired target routing, choosing from among all the calculated replacement circuits the one having less cost and replacing it, marking the corresponding demand as processed, and repeating the steps from the beginning until all the demands have been processed.

Abstract: A ringed optical transmission system comprises along the ring rare earth doped fiber amplifiers. The system has a gain peak with a ?ASE wavelength outside the ?1-?n band of the channels transmitted along the ring, the wavelength corresponding to an ASE emission peak of the amplifiers in the ring. In this manner a lasing peak forming a gain stabilization signal is produced.

Abstract: A method for automatic adaptation of connectivity by means of virtual concatenation groups of packet traffic in a circuit switched transport network in which an estimate of the packet traffic is made and the band available between packet interfaces which engage the transport network is increased or decreased by creation or removal of virtual concatenation circuits according to the necessities indicated by the estimate.

Abstract: A method for activation of circuits in telecommunications networks comprises a first step in which circuits are preplanned in the network and local definition data are distributed to network members (NE) for connection of sections of the preplanned circuits. In a second step, when it is desired to activate a preplanned circuit, activation messages for the connection of sections making up the preplanned circuit to be activated and which are defined by the data previously distributed to the network members are propagated in the network in cascade among the network members affected by the preplanned circuit by means of overhead bytes of the frames circulating in the network. The data are made up of indexed tables defining pairs formed from “next point (TP) to be connected” and “index” to be propagated for the following cross-connection. A network functioning in accordance with the method is also proposed.

Abstract: A ringed optical transmission system comprises along the ring rare earth doped fiber amplifiers. The system has a gain peak with a ?ASE wavelength outside the ?1-?n band of the channels transmitted along the ring, the wavelength corresponding to an ASE emission peak of the amplifiers in the ring. In this manner a lasing peak forming a gain stabilization signal is produced.