The types of Telecommunication systems are as described below:
a. Public Switching Telephone Network (PSTN):
This is the network in which two network nodes establish a dedicated communication channel through the network before the nodes may communicate. It usually consists of telephone lines, fiber optics, microwave transmission links, cellular networks, communication satellite and undersea telephone cables.
b. Circuit Switched Packet Telephone System:
This is a type of telecommunication system in which a dedicated channel (or circuit) is established for the duration of a transmission. The most ubiquitous circuit-switching network is the telephone system, which links together wire segments to create a single unbroken line for each telephone call.
c. Satellite Telephone System:
A satellite telephone system, satellite phone, or satphone is a type of mobile phone that connects to orbiting satellites instead of terrestrial cell sites. they provide similar functionality to terrestrial mobile telephones; voice, short messaging service and low-bandwidth internet access are supported through most systems.
d. Fixed Wireless Telephone System:
Fixed wireless is the operation of wireless devices or systems used to connect two fixed locations. The fixed wireless is usually a part of the wireless LAN infrastructure.