电话交换机与电话数字交换机的区别

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.

电话交换机通常分为空分程控电话交换机和时分程控电话交换机。前者是通过交叉点的连通，将某条线上的空隙话音信息，传递到另一条线上；后者是将时分复用线上的某一时隙话音信息，传递到另一时分复用线上。

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.

目前电话交换机主要分为模拟和数字的主要区别如下：

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

1、相对于模拟电话交换机，数字电话交换机通话距离远、传输速度快、通话音质清晰、误码少。

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

2、数字电话交换机为全绳路无阻塞，那么模拟交换机它有绳路线限制，当然交换机容量越少它的通话绳路也就越少。而模拟交换机有绳路线限制，当交换机容量越少时它的通话绳路也就越少，通话量大时会造成死机。

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、数字交换机接口丰富，它可以接入环路中继、载波、E/M、2M等中继，包括数字用户的2B+D、30B+D，具备组网、局用机汇接功能。

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、数字交换机通话间隔远、传输速度快、通话音质清楚、误码少。而模拟交换机相对而言相差好几倍。

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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