VoIP for Dummies Book - XO Communications

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XO Communications VoIP For Dummies
L
LAN: Local area network. A data network limited to a small
geographic area. A LAN can be as small as a couple of devices
connected on the same network or as large as a campus-wide
installation with numerous buildings and thousands of addressable
devices on the same network.
M
MAC: (1) In network terminology, an acronym for media
access control. The part of the network interface that controls
physical access to the LAN through the MAC address. (2) In
telephone system administration terminology, an acronym
for moves, adds, and changes. MAC describes the most
common type of maintenance necessary in traditional telephone
systems.
MAC address: An address that uniquely identifies a network
device. The MAC address is typically represented in hexadecimal
notation, as in 00-04-23-58-90-6E.
N
network feature: Calling features provided in a VoIP network.
For example, presence, Web surfing, and vemail are network
features.
NIC: Network interface card. Provides the network device,
such as a computer or a VoIP telephone, with its MAC address
and the means for connecting to the LAN.
O
off-net: In VoIP telephony, refers to calls that must be carried
on another network (usually the PSTN) external to the VoIP
network.
on-net: In VoIP telephony, refers to calls carried on the customer’s
network.