Introduction
This blog will mainly discuss circuit switching in computer networking. Before jumping on the circuit switching, let’s first understand what switching is. Switching is the process of creating a network for one-to-one communication with the help of switches. The switches are the series of interlocked nodes in the switched network. Switching can happen at several layers of the TCP/IP protocol suite, which are at the physical layer, data-link layer, and network layer.
Now, you must be eager to know what is circuit switching?
Circuit Switching
Circuit switching is the connection-oriented network switching method that is commonly used these days. Let’s discuss circuit switching in more detail.
Circuit switching is the dedicated connection established between the sender and receiver. The transmission of messages in circuit switching is done from the dedicated route, which has been established between the source and the destination. Each connection uses only one dedicated channel on each link. FDM and TDM are used to divide each link into ‘N’ channels. There are three phases of circuit switching connection which are as follows:
- Establishment of Circuit: Intermediate switching centres are used to establish a dedicated path from source to destination. The establishment is checked by transmitting communication signal requests and acknowledgements by sender and receiver.
- Data Transfer: Circuits are used to send data and voice from source to destination. The connection will exist till the end parties are communicating with each other.
- Circuit Disconnection: After the transfer of data, we need to disconnect the connection. This is initiated by any one of the users. The intermediate links are removed from the sender to the receiver.
source: myreadingroom
There are two types of circuit switching:
Space division circuit switching and time division circuit switching.
Space division circuit switching involves a dedicated path that is established between the calling subscribers and the called subscribers and the paths are separated from each other. It is also referred to as a crossover switch. It moves a bit stream from one circuit to another.
If a connection requires different time slots on the incoming and outgoing highways. Thus the switching network must be able to receive samples from a one-time slot and retransmit them in a different time slot.
40+ registered 
