IP telephony is a general term for the technologies that use
the Internet Protocol's packet-switched connections to exchange
voice, fax, and other forms of information that have traditionally
been carried over the dedicated circuit-switched connections
of the public switched telephone network (PSTN). Using the Internet,
calls travel as packets of data on shared lines, avoiding the
tolls of the PSTN. The challenge in IP telephony is to deliver
the voice, fax, or video packets in a dependable flow to the
user. Much of IP telephony focuses on that challenge.
Currently, unlike traditional phone service, IP telephony service
is relatively unregulated by government. In the United States,
the Federal Communications Commission (FCC) regulates phone-to-phone
connections, but says they do not plan to regulate connections
between a phone user and an IP telephony service provider.
IP Telephony Solutions