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1813 VoIP Gateway User’s Guide
G.991.2: An ITU-T specification for high speed DSL known as G.SHDSL.
G.DMT: Another name for the G.992.1 ITU specification.
G.lite: Another name for the G.992.2 ITU specification.
gateway: A communications device that connects two different networks.
header: The beginning of a frame or cell that contains management and addressing information.
hop: One point-to-point transmission in a series required to transmit a message between two
hosts in a network.
host: An addressable computer connected to a network.
hub: A device that serves as the central location for attaching wires form workstations.
ICMP: Internet Control Management Protocol. An Internet protocol that allows for the
generation of error messages, tests packets, and information messages related to IP.
IDSL: A form of ISDN DSL using 2B1Q line code.
IEEE: Institute of Electrical and Electronics Engineers.
IEEE: The Institute of Electrical and Electronics Engineers.
ILMI: Interim Local Management Interface. Provides ATM layer management between a
switch and a client device.
IP address: Internet Protocol address. The decimal-numeric, fixed-length address assigned to
an Internet host.
IP multicast: A technique that allows packets to be simultaneously transmitted over the
Internet to multiple destinations.
IPOA: IP over ATM.
IRQ: Interrupt re-quest, a hardware interrupt on a PC.
ISO: International Standards Organization.
ISP: Internet Service Provider. An organization that provides access to the Internet.
ITU: International Telecommunications Union. The telecommunications agency of the United
Nations.
kbps: Kilobits per second.
LAN: Local Area Network. A LAN is a data communications system that lies within a limited
spatial area, has a specific user group, and has a specific topology.
latency: The time it takes a signal to transmit from its source to its destination.
LED: Light Emitting Diode. A light or status indicator.
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