What is the difference between Telephone and Intercom?


Telephone is an instrument which reproduce sound at a distance through the help of electricity. It is one of the easiest and common used device of oral communication. It facilitates quick exchange of information through personal talk.

What is the difference

between Telephone and


There are two types of telephonic communication like

external telephonic communication and internal

telephonic communication. In the former

communication an employee of the organization talks

with another outside the organisational building.

In the later communication an employee talks with another within the organization. Because of this

nature of telephonic communication, it has been told that it is quickest and convenient means of external

and internal communication. There are three types of telephone connections like direct exchange line,

private branch exchange and intercom.

Intercom system of communication has become very popular in

our country. It is used to supplement private branch exchange

system and operates without an exchange. As this system is not

connected with telephone exchange, no permission is needed from

the post and telegraph department for the use of intercom service.

Multicore cables and telephone receivers are used in this system.

Push buttons are used in the receiver set. By putting the button

instant connection is obtained with any one of the circuit. If he

wants to talk a number of persons at a time he can push the

conference key available in the intercom. Today computerised

intercom system are developed.

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