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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 rewalls.
DMZ (Demilitarized Zone): Devices set up to be in the router’s DMZ will see
all network trafc.
Port Forwarding: The router will forward public-side incoming information to a
specied device on the private side. The router will forward only the data
that is received on the specied 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 specied path in which data travels. Each type of data that is
transmitted over the Internet travels down a specied port. A router will
forward information from one port to another, and a rewall will open
only a specied 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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