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１０月第１０期北电网络服务中国３０周年一、光通信发展的新亮点———城域网在当前骨干网上仍有大量富余带宽而很多用户却得不到充足带宽的情况下，北电网络认为城域光传输网络可以实现骨干传输网络同接入网络的汇接，并将成为光通信发展的新亮点。北电网络的城域网技术方案
October 10, Nortel Networks 30th Anniversary of China’s Service I. New Highlights of Optical Communication --- MAN still has plenty of bandwidth on the current backbone network and many subscribers do not have enough bandwidth. Nortel The network believes that the metro optical transport network can achieve the convergence of the backbone transport network and the access network and will become a new bright spot in the development of optical communications. Nortel network MAN technical solutions