Abstract: A data transport method in a telecommunications system is provided. The method comprises creating a traffic channel connection between two network elements in the telecommunications system, allocating data of a number of user entities for transportation over the virtual channel using overbooking, buffering data packets into separate buffers, according to the priority level of the packets, to wait for transport over the traffic channel, and multiplexing the data packets with determined priority levels into the virtual channel according to the priority level of the packets such that whenever higher priority level data packets are available, the higher priority level data packets are multiplexed into the virtual channel before lower priority level data packets. Additionally, formation of user data packets is controlled according to a filling degree of at least one of the buffers.