Abstract: The present invention provides a method for transporting TDM traffic through packet switched networks. The nodes of the packet switched network are MPLS adjusted, and the timeslots of a TDM connection are encapsulated in data frames in the transmitting circuit switched node, and added one or more MPLS label(s) by means of the MPLS label stacking concept to identify the fixed path through the packet switched network and to uniquely address the PCM system of the circuit switched receiving node. The present invention is particularly useful for transmission of real-time data traffic through IP network.

Abstract: The present invention describes a method in telecommunication networks where time division multiplexing traffic is transported over packet switched networks comprising one or a number of transmitting parties where the transmitting party will not send idle timeslot data on the transporting network. In one preferred embodiment will the transmitting party provide information regarding which timeslot hat are not used. Said telecommunication network can preferably be a packet switched network, wherein the packet switched network is one of the following: an IP-network, MPLS, ATM or Frame Relay.