VoIP
Voice Over Internet Protocol also called as IP telephony or Internet telephony or Broadband telephony. Also refers as Phone service over Internet. This technology allows to make voice call using broadband internet connection instead of regular phone line. It is used for delivery of high range voice communications as well as multimedia sessions over Internet Protocol (IP) networks that’s why it is called as Voice over IP. Now it is one of the most effective way of delivering voice between people.
In VoIP, Internet is used as the transmission medium for telephone calls by sending voice data in the form of packets using (Internet Protocol) IP. It transmits real time voice signal from source IP address to the target IP address. In the current days Voice Over Internet Protocol (VoIP) is one of the reliable, and cost-effective alternative to early/traditional phone service.
PSTN
PSTN stands for Public Switched Telephone Network also known as traditional circuit-switched telephone network formerly it was known as only Public Telephone Network. PSTN refers to a telecommunications network which allows voice communication between people at different sites. Public Switched Telephone Network uses an old technology which uses copper wires to carry analog voice signal. It is operated by local, national and international carriers.
Public Switched Telephone Network is based on Circuit Switching concept. When a dedicated path is established between two phones a circuit is established between them. All Landlines are Public Switched Telephone Network (PSTN).
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