Table of Contents
Advertisement
Firmware:
Software that has been temporarily or permanently loaded into ROM.
Flash memory:
A type of RAM that retains its information, even after the device in which it resides is
powered down.
FTP:
File Transfer Protocol. A TCP/IP standard protocol for transferring files
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.
IEEE:
The Institute of Electrical and Electronics Engineers.
IP address:
Internet Protocol address. The decimal-numeric, fixed-length address assigned to an Internet
host.
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.
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.
LED:
Light Emitting Diode. A light or status indicator.
MAC address:
Media Access Control address. The unique fixed address of a piece of hardware,
normally set at the time of manufacture and used in PAT protocols.
MAC:
Media Access Control, a protocol for determining which device has access to the network at any
one time.
Mbps:
Megabits per second.
NAT:
Network Address Translation is a transparent routing function that translates a Private IP address
on a PAT into a Public address that can be used in a public network.
Network address:
The network portion of an IP address.
Network protocol:
Network protocols encapsulate and forward data packets from one interface to
another.
Noise:
Unwanted interference to a transmitted signal by an outside source.
PAP:
Password Authentication Protocol. PPP protocol that ensures authentication of the connection
between two devices.
PAT:
Port Address Translation is a form of NAT that maps multiple Private IP addresses to a single
Public IP address.
1823-A2-GB20-00
May 2005
1823 VoIP Gateway User's Guide
47
Advertisement
Table of Contents
