電話交換機的種類有哪些？

Program-controlled PBX is applied to medium-sized enterprises, factories, schools, institutions, large and medium-sized hotels and other occasions. The characteristics are: the extension branch is widely involved in distance, generally reaches 5000 meters round, and has some special interfaces.

程控交換機： 應(yīng)用于大、中型企業(yè)集團使用，一般由運營商提供30B+D數(shù)字中繼DID方式接入以模塊局、虛擬網(wǎng)的方式構(gòu)建做為局用交換機的下放的終端局。特點是：注重設(shè)備的構(gòu)造的穩(wěn)定性、接口的多樣性、系統(tǒng)的嚴謹性，較少的使用分機的細節(jié)功能，完成能實現(xiàn)基本的通話功能就可以。

SPC Exchanges: used in large and medium-sized enterprise groups, generally provide 30B+D digital relay DID by operators, access modules and virtual networks, and build terminal bureaus for local switches. The characteristics are: focusing on the stability of the structure of the device, the diversity of the interface, the rigor of the system, and the detailed function of the extension machine, so that the basic call function can be completed.

程控調(diào)度機： 應(yīng)用于電力、水利、工礦等特殊環(huán)境，是針對這些特殊的環(huán)境設(shè)計的一種專用電話交換機，用于企業(yè)生產(chǎn)調(diào)度的應(yīng)用。由于其使用環(huán)境惡劣、復(fù)雜且有著極高的重要 性，故除了要實現(xiàn)一些特殊功能外，對設(shè)備的工藝、元件采用、防磁干擾等方面都有特殊的設(shè)計要求。

Program-controlled dispatcher: applied to power, water conservancy, mining and other special environment, is a special telephone exchanger designed for these special environments, which is used for enterprise production scheduling. Because of the bad environment and complex and has a high importance, so in addition to realize some special functions, the equipment, technology, and other aspects of components using magnetic interference have special design requirements.

軍用電話交換機： 功能極其簡單，采用原始的脈沖、甚磁石設(shè)計。

Military telephone switchboard: the function is extremely simple, using the original pulse, even the magnet design.

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