52 V85 Desktop VoIP Phone User Guide
YML772 Rev1
in-line filter See Microfilter
Internet The global collection of interconnected networks used for both
private and business communications.
intranet A private, company-internal network that looks like part of the
Internet (users access information using web browsers), but is
accessible only by employees.
IP See TCP/IP.
IP address Internet Protocol address The address of a host (computer) on the
Internet, consisting of four numbers, each from 0 to 255, separated
by periods, e.g., 209.191.4.240. An IP address consists of a network
ID that identifies the particular network the host belongs to, and
a host ID uniquely identifying the host itself on that network. A
network mask is used to define the network ID and the host ID.
Because IP addresses are difficult to remember, they usually have
an associated domain name that can be specified instead. See also
domain name, network mask.
ISP Internet Service Provider A company that provides Internet access to
its customers, usually for a fee.
LAN Local Area Network A network limited to a small geographic area,
such as a home, office, or small building.
LED Light Emitting Diode An electronic light-emitting device. The
indicator lights on the front of the ADSL modem are LEDs.
MAC address Media Access Control address The permanent hardware address of a
device, assigned by its manufacturer. MAC addresses are expressed
as six pairs of characters.
mask See network mask.
Mbps Abbreviation for Megabits per second, or one million bits per
second. Network data rates are often expressed in Mbps
Microfilter In splitterless deployments, a microfilter is a device that removes
the data frequencies in the DSL signal, so that telephone users do
not experience interference (noise) from the data signals. Microfilter
types include in-line (installs between phone and jack) and wall-
mount (telephone jack with built-in microfilter). See also splitterless.
NAT Network Address Translation A service performed by many routers
that translates your network’s publicly known IP address into a
Private IP address for each computer on your LAN. Only your router
and your LAN know these addresses; the outside world sees only the
public IP address when talking to a computer on your LAN.
NAT rule A defined method for translating between public and private IP
addresses on your LAN.
