電話交換機與電話數(shù)字交換機的區(qū)別

The telephone switchboard is an automatic telephone exchanger controlled by computers according to a pre programmed program. It is composed of hardware and software. The hardware includes telephone part, control part and input and output part. The software includes program part and data part.

電話交換機通常分為空分程控電話交換機和時分程控電話交換機。前者是通過交叉點的連通，將某條線上的空隙話音信息，傳遞到另一條線上；后者是將時分復用線上的某一時隙話音信息，傳遞到另一時分復用線上。

Telephone switches are usually divided into empty SPC telephone switches and time division program-controlled telephone switches. The former transfers the voids information on one line to another through the connection of crossover points, and the latter transfers the voice information from one time slot to another on the other time line.

目前電話交換機主要分為模擬和數(shù)字的主要區(qū)別如下：

At present, the main differences between analog and digital telephone switches are as follows:

1、相對于模擬電話交換機，數(shù)字電話交換機通話距離遠、傳輸速度快、通話音質(zhì)清晰、誤碼少。

1. Compared with analog telephone switches, digital telephone switches have long distance, fast transmission speed, clear voice quality and little bit error.

2、數(shù)字電話交換機為全繩路無阻塞，那么模擬交換機它有繩路線限制，當然交換機容量越少它的通話繩路也就越少。而模擬交換機有繩路線限制，當交換機容量越少時它的通話繩路也就越少，通話量大時會造成死機。

2, the digital telephone exchange has no blocking for the whole rope Road, so the analog switch has a rope route restriction, and the less the capacity of the switch is, the less the call line it will be. The analog switch is restricted by the rope route, and the less the switch capacity is, the less the call line is, and the heavy traffic will cause the crash.

3、數(shù)字交換機接口豐富，它可以接入環(huán)路中繼、載波、E/M、2M等中繼，包括數(shù)字用戶的2B+D、30B+D，具備組網(wǎng)、局用機匯接功能。

3, the digital switch interface is rich, it can access loop relay, carrier, E/M, 2M and other relays, including digital users' 2B+D and 30B+D, and has the functions of networking and office machine tandem.

4、數(shù)字交換機通話間隔遠、傳輸速度快、通話音質(zhì)清楚、誤碼少。而模擬交換機相對而言相差好幾倍。

4, the digital switch is far away from the telephone, the transmission speed is fast, the voice quality is clear, and the bit error is less. The analog switches are a couple of times different.

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