VoIP for Dummies Book - XO Communications

64
XO Communications VoIP For Dummies
early developers of the Internet agreed upon the name TCP/IP
because, at the time, TCP and IP were considered the two
most important protocols for any network connection.
toll bypass: A term that concisely describes how VoIP telephony
service completely sidesteps the regulated, circuitswitched
PSTN and all its associated toll usage charges
by carrying telephone calls over private, packet-switched
networks.
triple play: Refers to the capability to integrate data, voice,
and video applications on the same transport.
U
UDP: User datagram protocol, an encoding protocol implemented
at the transport layer of VoIP telephony and
videoconferencing calls.
V
vemail: A network feature supported with VoIP telephony in
which the user can elect to hear their e-mail or print a hardcopy
of their voice mail.
voice mail: A popular calling feature that allows callers to
leave a message in the event that the called party can’t
answer the call. Voice mail comes at no additional cost with
VoIP telephony.
VoIP: Voice over Internet protocol. A network service that supports
carrying telephone calls over packetized networks. VoIP
reduces substantially or eliminates the need for a separate,
circuit-switched telephone network to carry telephone calls.