WDM especially DWDM is widely used in long haul network because it can extremely expand the band, however in short haul area CWDM is paid attention to be cause its properties.
波分复用尤其是DWDM技术能极大拓展带宽，在长途干线上得到广泛应用，而在短距离传输中，CWDM由于其一系列特点已越来越引起人们的重视。
For the new contract, Dell Perot Systems will continue to provide network operations, desktop services, email, information assurance, telephones, and connectivity to long-haul communications.
根据新的合同，戴尔perot系统公司将继续提供网络运营、桌面服务、电子邮件、信息安全保障、电话和长途通信。
With the evolution of metropolitan transmission network and the bandwidth requirement, DWDM technology will be entered into metropolitan network area from long haul backbone network.
随着城域传输网的演变和对带宽的需求，密集波分复用技术将由长途骨干网进入城域传输网。
Previous studies have focused on the cargo collection service network; the enterprise internal line-haul operations network is rarely explored.
以往研究皆著重于集配车服务网路之领域，企业内部营运网路则较少探讨。
Previous studies have focused on the cargo collection service network; the enterprise internal line-haul operations network is rarely explored.
以往研究皆著重于集配车服务网路之领域，企业内部营运网路则较少探讨。
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