Where/how is ATM used ?
	ATM is a transmission technique: A company can implement its own ATM network. Network operators provide fixed ATM connections for subscribers on a permanent contract basis (Permanent Virtual Circuits = PVC) A network operator can use ATM for internal traffic (so long as QoS conditions of higher layer services are fulfilled). Example: UMTS RAN    In both cases no signalling is required, traffic    management is optional!