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1 概 述目前,随着各电信运营商业务发展的需要和对未来业务的长远规划,城域传输网已经成为建设热点。城域传送网是指覆盖范围为城市以及郊区,以多业务光传送网络为基础,实现话音、数据、图像、多媒体、IP等业务的接入,并完成接入网与骨干网络之间全方位的协议互通。2
1 Overview At present, with the development of various telecom operators and the long-term business plan for the future, metro transport network has become a hot spot for construction. Metro transport network refers to the coverage of the city and the suburbs to multi-service optical transport network-based, voice, data, images, multimedia, IP and other business access, and complete access networks and backbone network between the full range The agreement interoperability. 2