Difference between public network and private network of digital trunked interphone

Digital trunking communication system can be divided into public network intercom system and private network interphone system according to different application modes. The operator is responsible for the construction and maintenance of the public network interphone cluster system. Multiple groups or departments can use the network together through the group mode, and achieve certain service quality assurance and priority functions. Compared with the trunked public network, the interphone system of trunking private network refers to the cluster network constructed and maintained by a certain department and used only in its own department.

From the positioning of the two, the digital trunking private network interphone provides services for the users mainly from the government departments, and the public security, fire control and urban emergency linkage system applications focus on social benefits; while the digital trunking public network interphone is positioned for commercial applications (property, oilfield, bank, public), focusing on economic benefits and taking into account social benefits.

The differences between digital trunking public network and digital trunking private network are as follows:

(1) It is a commercial entity, operated by the operating company, providing services to users, rather than a private network for internal use of a department;

(2) It mainly reflects economic benefits on the basis of social benefits, while private networks mainly reflect social benefits;

(3) It has a wide range of users, and the users of private network are only limited to their own departments;

(4) It can centralize the use of frequency, so that these frequencies can serve more users and improve the frequency utilization.

Generally speaking, compared with private network intercom system, the biggest advantage of public network intercom system is that it can effectively use various resources, and operators can operate and maintain network infrastructure, so as to improve the quality of network operation and reduce the operation cost. However, for some departments with high call quality and priority requirements, public network intercom may be difficult to meet the requirements, or need to pay a high network cost. However, the fire department, the armed police department, the public security department and the judicial department of public security, as well as some enterprises that have very strict requirements on communication quality, such as airports, railways, subway / light rail, etc. In order to ensure social benefits and public security, the dispatching command communication needs of these departments should be dedicated to the private network.