The key issues and development process are analyzed and a net - phone application is developed to confirm the feasibility and correctness of the proposed network design 文章阐述了基于高级信元传输网络的应用软件开发与设计思想，分析了软件开发过程中的关键问题和软件开发流程。
Because of the large potential bandwidth of fiber and the fast development of wdm system , nowadays the optical communication has become one of the key technologies for communication networks 光纤的巨大潜在带宽和波分复用技术的成熟应用,使光纤通信成为支撑通信传输网络的主流技术。
Dwdm system can be utilized in construction of long - haul transmission network as well as short distance transmission network such as man ( metropolitan area network ) Dwdm系统既适合于构架长距离的传输网络，也可用作诸如城域网( manmetropolitanareanetwork )等短距离传输网络的首选方案。
Recent research projects : one , multi - carrier cofdm dvb - t mobile tv transmission system . second , the military , public security wireless digital voice encryption image transmission network 公司最近研发项目：一dvb - t多载波cofdm移动电视传输系统。二部队公安无线数字加密图像语音传输网络
The advanced and reliable characters are sufficient proved in transmission network for telecom , electric power , water conservancy , oil field , traffic , telecast and broadcast , etc 产品的先进性与可靠性已在遍及全国二十多个省的电信、电力、水利、油田、交通、广电等传输网络中得到了充分的验证。
Comparing to the way of renting communication wire , the transmit network can be saved ; the cost of communication can be decreased and the flexibility of networking can be promoted 与原来租用通信线路进行联网的方式相比,节省了昂贵的传输网络,大大降低了通信成本,而且提高了联网方式的灵活性。
Internet has already gradually developed from a single data transferring network to an integrated network that transfers multimedia such as data , audio , video 计算机网络技术飞速发展，随着互联网日益壮大。 internet已经逐步由单一的数据传送网络向数据、音频、视频等多媒体信息综合传输网络演化。
Therefore transmitting video signal in existing channel characteristic and transport network , error processing : error resilience , error concealment are very important and outstanding 因此在现有的传输网络和信道特性的信道上传输视频信号，其错误处理：数据恢复、错误掩盖就尤为重要和突出了。
The sonocal 3000 系列 of ultrasonic heat meters are designed for accurate high - resolution energy measurement in heavy duty water - based district heating , i . e . for power stations , exchange stations or transmission nets 系列超声波热表用于在区域供热中高分辨率精确的能量测量，比如，电站，交换站或者传输网络。
The state grid , the government - owned holding company for a sprawling network of provincial and regional transmission companies in china , is the largest power company in the world , with 1 . 5m employees 国有控股的国家电网公司，在中国拥有省级和地区级的子公司和传输网络，它是世界上最大的能源企业，拥有150万员工。
