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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 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)
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