Industry background:
  system of forestry to protect the national forest resources and promote the healthy development of the forestry economy important responsibilities. Forest area in our country has the characteristics of highly concentrated and unit area is vast, in the event of severe accident, need the first time trying to identify hazards and fixing the danger zone. forestry work demand for communication is becoming more and more prominent.
forestry construction technology in digital ultrashort wave communication system, wireless link network technology, video transmission technology and so on the basis of the formation of communication network, strive to build the air and ground, cable and wireless, the combination of fixed and mobile chain, three-dimensional emergency communication system, improve forest fire prevention communication coverage and transmission rates, to ensure that in the case of forest fires, capable of using various means of communication security fire information transmission, so as to minimize the loss of forest fire.
to solve the problem of communication needs of a growing forestry work, promote forestry workers work efficiency and achieve the goal of a unified command, the kelly for forestry user provides a set of meet the provincial networking, high reliability, simple to use, powerful digital wireless communication system & # 8212; The & # 8212; Digital IP interconnected system with PDT digital broadcast system.

Stories
Kaili through careful research and analysis of forestry user communication needs, provides a set of perfect digital wireless communication system solutions. Forest fire prevention digital wireless ultrashort wave communication by provincial, municipal construction scheduling management control center, the county (area, city) level 2 dispatching center, in the construction of key forest fire area (mountain) fixed base station, mobile base stations, software management platform to build comprehensive wireless communication system, the formation of provincial, city and county of the province networking (area, city) level 3 forest fire prevention command scheduling network framework, within the scope of the system, to ensure that the province's communications and by county (area, city) and the forest farm as unit to establish multiple subnets, each subnet can separate communications channel resources and do not take up other subnets. Provincial, city and county (area, city) level scheduling management control center within the scope of their jurisdiction on forest protection personnel around the terminal for remote dispatching management, including the call control function (group a shout, shout, all call, emergency alarm, etc.), data application management (short messages, GPS positioning information, attendance management, etc.), at the same time, the system can through the IP network to the running state of the base station for inspection and maintenance of base station configuration parameters.

PDT With the system
PDT with multicast system is a kind of partition covering the wide-area communication system, with the aid of multiple base stations to achieve better than a single base station system wide communication coverage, each base station receive frequency in the system and the transmitting frequency is consistent, so the system of high spectrum efficiency, mobile users in roaming across the base station handoff, need not to register the location, there is no drop words. The whole system don't like cluster cell communication need complex signaling system, the system structure is simple, applicable resourceful users occupy less frequency resources, the application of large coverage, low traffic.

Digital IP interconnected system
the basic principle of IP connectivity is through Ethernet based on TCP/IP protocol will be dispersed more than the turntable and connected, so as to realize the communication of a broader coverage. System structure is simple, applicable resourceful users than a wide range of base station network applications.

Features:
•Can provide a rich business functions, such as: single shout/group shout/all call/module compatible/emergency call/emergency alarm/remote dizzy/remote shoot/check terminal/environmental monitoring/graceful degradation, etc.;
•Adopt an all-ip network, support for multiple transmission link (IP, E1, wireless links, etc.);
•Terminal can seamless roaming, lighter relief easy to use;
•Scheduling multi-polarization, support hierarchical classification management;
•Perfect connectivity function, the system can be connected with other systems through a variety of gateway;
•Support the star, string type, tree, ring and other network forms
•Provide secondary development interface to facilitate users in terms of personality development, expand more kinds of data applications business;
•PDT with information system cut just a pair of frequency point, solve the forest stand construction more frequency resources tense problem, which can effectively solve the problem of signal in the overlapping coverage OuDeTong frequency interference, the province's forestry system communication coverage;

Plan the topology

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