Frame relay won in the WAN over ATM, which proved too expensive despite its good points, such as five levels of QoS. Now MPLS is pushing aside both.

Making frame-relay-compliant premise equipment is easy, and any complexity, such as adding differentiated classes of service, is performed within the network.

While rates for many telecom services have long plummeted, some users find themselves paying up to twice as much today for low-speed frame relay as they did 18 to 24 months ago, according to ...

Out go ATM, Frame Relay and leased lines. In come DSL, Ethernet and IP virtual private networks (VPNs). It may not be quite that simple but the world of data communications is in the midst of ...