The composition and development of modern communication network

(1) The composition of the modern communications network A complete modern communications network, in addition to the transmission of a variety of user information business network, but also need to have a number of support networks. Business network, signaling network, synchronization network, management network The future development trend of modern communication network can be summarized as "six", that is, the digitalization of communication technology, integrated communication services, network interoperability and integration, communication network broadband, intelligent network management and personalized communication services.

The composition of the local telephone network 1. the basic components of the telephone communication system 2. the structure of the telephone network 3. the local telephone network 4. the network structure of the local telephone network

①Local telephone network refers to the telephone network in a unified number length of the numbering area, by the end of the bureau, the convergence bureau, the bureau of inter-bureau trunks, long city trunks, as well as the subscriber line, the telephone set. Domestic long-distance telephone network is a telephone network for long-distance calls between cities in the country, with one or more long-distance telephone bureaus in each city and long-distance circuits connecting the bureaus. ③International long-distance telephone network is a telephone network that connects the telephone networks of various countries in the world to make international calls. In order to do so, each country needs to set up one or more international telephone offices for international calls and incoming calls. An international long-distance call is actually composed of the domestic network of the sending country, the international bureau of the sending country, the international circuit and the international bureau of the receiving country, and the domestic network of the receiving country.