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A digital switch is a hardware device for handling digital signals. The main function of these switches is to manage digital signals generated or passed through a telephone exchange and then forward it to the telephone company's back-end network. The communication between the subscribers of a telephone company is established with the help of digital switching. Digital switches can be of different types based on the number of lines they handle and the included features. Digital switches are much faster in performance compared to analog switches.
The purpose of a digital switch is to connect digital signals. These can be represented by different numbers, but they can be in only one of two states: 0 or 1. Digital switches are not designed to handle signals of various states having multiple numbers. Analog switches are suitable for representing multiple-state signals.
Digital switches can be of different types. The main two types of switching are:
There are multiple types of digital switches available based on their functionality. For example, private branch exchange (PBX) is a digital switch managed by a private company, while centrex is another type operated from a central office.