A configurable edge device for use in a network, the edge device being adapted and configured to be coupled to at least one other edge device in a network, and including an admission controller for controlling admission of data traffic onto a pre-defined flow over a physical link, and a router for routing the data traffic through the edge device onto the pre-defined flow in accordance with a pre-defined routing scheme, wherein operation of the admission controller and the router is controlled in accordance with data defining all physical and logical links in the network; a telecommunications carrier network for data traffic, the network including at least two such configurable edge devices, and a method for transmitting data traffic through such an edge device.