It brought better management and helped turn telephone communications into a lucrative and revolutionary industry.
Lifewire / Evan Polenghi
Until relatively recently, PSTN was the default for most people.
Most homes and businesses had landlines.
Lifewire / Evan Polenghi
Plus, the PSTN was the main carrier for internet connectivity in some parts of the world.
Even using alternative means of communication such as VoIP and otherOTTtechnologies often required a PSTN line for internet connectivity.
All this has changed, however.
Most people carry cellphones now, and internet access is no longer analog in most areas.
Longer distances meant higher costs.
The PSTN leveled the cost despite the distance.
Switches and Circuits
The PSTN consists of switches at centralized points on the networks.
These switches act as nodes for communication between two points on the connection.
Thistype of switchingis called circuit switching.
This resulted in free voice communications on the internet through VoIP.
