帧中继技术是一种成熟的快速分组交换技术，而AT M技术则是宽带网络的重要技术。
Frame Relay is a kind of mature fast switch technology, while ATM technology is one of the important broadband technologies.
在软交换网络体系中，IP中继媒体网关完成电路交换网侧与IP分组网络侧媒体流的转换，同信令网关一起完成电路交换网与IP网络的互通。
Trunking Media Gateway transmits media stream between IP and circuit switching networks, implements interworking of IP and circuit switching networks with signaling gateway in Softswitch network.
为什么在AT M承载帧中继呢？近年来广域网上分组定向的业务量有着惊人的增长。
Why Is Frame Relay to be Carried over ATM? There has been a fantastic expansion of packet oriented traffic over the WAN in the past few years.
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