Review Of Internet Telephony Service Provider References. Web an internet telephony service provider (itsp) is a company that allows users to make and receive calls over the internet, bypassing traditional phone systems. Voice over internet protocol (voip) software uses an ip network to transmit phone calls seamlessly without the need to connect to an extra telephone network.
Although its name suggests that it only enables voice calls, modern voip services are far more capable and can offer video calls, file transfer, group calls, and much more. Below are our top, tested picks from. Itsps use a variety of signaling and.
