A method, implemented in a network with a control plane, is described for creating a compound Service Level Agreement (SLA) call for a Time Division Multiplexing (TDM) service in the network. The method includes creating the call with a non-preemptible component and a preemptible component, the compound SLA comprising the non-preemptible component and the preemptible component; implementing endpoints for the call at a source node and a destination node; and responsive to a preemption event in the network, removing the preemptible component at the endpoints. A node and network are also described.