A telephone switching network having a plurality of nodes interconnected through the network through channels having dynamically changeable capacity. The telephone switching network includes a plurality of switching nodes and a network manager responsive to each one of the nodes for allocating traffic capacity of the network among the nodes dynamically in accordance with the traffic requested at the plurality of nodes. Each one of the nodes is coupled to the network through an ATM ADM. Each one of the ATM ADMs is coupled to a narrowband switch through an ATM switch. The nodes are interconnected through an ATM SONET.