VoIP
VoIP (Voice over Internet Protocol) is a technology that enables voice transmission via the internet - commonly referred to as internet telephony. During such a connection, data is transmitted over internet links using the IP protocol instead of traditional terrestrial transmitters. VoIP enables calls both with other users and with people using mobile or landline phones.
Advantages of VoIP
- very low costs for domestic and international calls to mobile and landline phones,
- free calls within the operator's network,
- no roaming restrictions,
- the ability to purchase a phone number in any location in the world (both locally and internationally)
Read also:
Useful links:
https://pl.wikipedia.org/wiki/Voice_over_Internet_Protocol
https://www.komputerswiat.pl/poradniki/internet/przewodnik-po-telefonii-voip/yrc33jk
https://magazyn.ceneo.pl/artykuly/telefon-voip-co-to-takiego