DMR(Digital Mobile Radio)数字集群通信标准是由ETSI(欧洲通信标准协会)制定的,旨在满足欧洲各国的中低端专业及商业用户对移动通信的需求。DMR标准采用TDMA(双时隙)多址方式，12.5KHz信道间隔、4FSK调制方式，数据传输速率为9.6Kb/s。

The DMR (Digital Mobile Radio) digital trunking communication standard was developed by ETSI (European Communications Standards Association) to meet the needs of low-end professional and business users in European countries. The DMR standard adopts TDMA (dual time slot) multiple access mode, 12.5KHz channel spacing, 4FSK modulation mode, and data transmission rate of 9.6Kb/s.

PDT数字集群系统是一个多信道共享无线通信系统，不再把终端绑定到某一个信道上，而是在终端发起语音、数据传输时，由控制中心自由分配1个空闲业务信道，实现信道的共享和灵活配置使用，提高了频率利用率和系统容量PDT数字集群技术由中国自主研发，并在公安、消防、交通等关键领域得到广泛应用。

PDT digital trunking system is a multi-channel shared wireless communication system, no longer bind the terminal to a certain channel, but when the terminal initiates voice and data transmission, the control center freely allocates 1 idle service channel, realizes the sharing and flexible configuration of the channel, improves the frequency utilization rate and system capacity PDT digital trunking technology is independently developed by China, and has been widely used in key fields such as public security, fire protection, and transportation.

RPT(Ruling Professional Trunking)集群系统是上海中欧体育信息工程有限公司面向商业专业级用户推出的数字集群系统，RPT集群系统基于DMR Tier 川协议，实现多站点之间的互联的同时，共享站点的逻辑信道资源，从而整合通信资源，使更多用户可在站点内进行高密度的语音通信与数据传输。

RPT (Ruling Professional Trunking) trunking system is a digital trunking system launched by Shanghai Lielong Information Engineering Co., Ltd. for commercial professional users, RPT trunking system is based on the DMR Tier Sichuan protocol, which realizes the interconnection between multiple sites and shares the logical channel resources of the site, so as to integrate communication resources, so that more users can carry out high-density voice communication and data transmission in the site.

全光网（AON）天馈系统，使用了全光纤线路连接进行数据传输，避兔了常规天馈系统中存在的，底噪嘉升、驻波比提升、杂散信号汇集等问题，而以上问题往往会随着同一套系统中天线数量的增多而愈发明显，最终导致系统瘫痪。全光网天馈系统的特性使单系统大天馈成为可能。整个天馈具有跨越式的变化，全光链路，由核心层、交换层、扩展层组成，改变链路的整体结构。

The all-optical network (AON) antenna feeder system uses all-optical fiber line connection for data transmission, which avoids the problems of noise floor increase, VSWR increase, and stray signal convergence in the conventional antenna feeder system, and the above problems often become more and more obvious with the increase in the number of antennas in the same system, and eventually lead to system paralysis. The characteristics of the all-optical network antenna feeder system make it possible to use a single system to scale the antenna feeder. The all-optical link is composed of a core layer, an exchange layer, and an expansion layer, which changes the overall structure of the link.