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在帧中继上提供话音业务在帧中继上提供话音业务特别适用于那些由于业务量小而不采用虚拟专用网络（ＶＰＮ）的中小用户。帧中继从５年前开始商用化以来，以其具有投资少、速率高等独特的优点使其发展很快。但是帧中继却不能像在时分复用器网络上那样允许用户既可以传数据...
Providing voice services over Frame Relay Providing voice services over Frame Relay is especially suitable for small and medium users who do not have a virtual private network (VPN) due to their small traffic. Frame relay has been developing rapidly since its commercialization five years ago, with its unique advantages of low investment and high speed. But Frame Relay does not allow users to pass data as it does on a time-division multiplexer network.