一项叫做光以太网的新技术开始使城域网(MAN)发生变革。
A new technology called Optical Ethernet is beginning to revolutionize metropolitan-area networks (MAN).
无源光以太网(EPON)是一种基于以太网的光接入技术，具有很大的发展潜力，是目前宽带接入技术研究的热点。
Ethernet passive optical network (EPON) which is a potential optical access technology based on Ethernet has become the current focus of research for broadband access technology.
光以太网可以跨越地区提供极高的带宽——100兆位/秒、1吉位/秒，甚至更高，而其价格与今天的1.5兆位/秒的T-1线路相当。
The Optical Ethernet can deliver very high band width-100M bit/s, 1G bit/s or even higher-across districts and counties, at prices similar to today's 1.5M bit/s T—1s.
光以太网可以跨越地区提供极高的带宽——100兆位/秒、1吉位/秒，甚至更高，而其价格与今天的1.5兆位/秒的T-1线路相当。
The Optical Ethernet can deliver very high band width-100M bit/s, 1G bit/s or even higher-across districts and counties, at prices similar to today's 1.5M bit/s T—1s.
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