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QoS (Quality of Service): Allows guaranteed bandwidth and packet delivery
between
network devices over a network.
Router: A device that attaches two or more network devices and forwards
data accordingly. Most consumer type routers act as DHCP servers,
NATs and simple firewalls.
DMZ (Demilitarized Zone): Devices set up to be in the router’s DMZ
will see all network traffic.
Port Forwarding: The router will forward public-side incoming
information to a specified device on the private side. The router will
forward only the data that is received on the specified ports. This is
usually set through the advanced settings in the router’s web
interface. Also known as Virtual Server or Firewall Rules.
Ports: A port is a specified path in which data travels. Each type of
data that is transmitted over the Internet travels down a specified port.
A router will forward information from one port to another, and a
firewall will open only a specified number of ports.
SQCIF (Subquarter Common Intermediate Format): An intermediate video
format. SQCIF resolution is 128x96. The DVC-1000 VideoPhone will
send SQCIF-sized video only if the remote endpoint cannot decode
CIF or QCIF.
SLIC (Subscriber-Line Interface Circuit):
Provides a phone’s analog dial
tone, busy tone, dual-tone multiple-frequency (DTMF) generation and
decoding, caller ID and ring-signaling functions. The SLIC allows the
DVC-1000 to work with a standard telephone without connecting to
the phone system.
TCP (Transmission Control Protocol): An Internet protocol used by the
DVC-1000 VideoPhone in addition to UDP.
UDP (User Datagram Protocol): The Internet protocol most commonly
used by the DVC-1000 VideoPhone to send and receive audio and
video data.
WAN (Wide Area Network): A network that is designed to span large
distances. See LAN.
Glossary of Terms (continued)