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. The debate about frame relay vs. ATM as WAN ...

In 1992, frame relay was portrayed as an interim technology that would be replaced by Switched Multimegabit Data Service. In 1995, industry insiders predicted frame relay would be devoured by ATM.

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 industry ...