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Glossary
Glossary
ARC
An abbreviation for Adaptive Rate Control.
Technology which automatically lowers a
video streaming bitrate against network
congestion.
ARQ
An abbreviation for Automatic Repeat
reQuest. Error control method in which the
receiver requests a retransmission from the
transmitter when a packet loss occurs.
Auto Bandwidth Detection
Detects the network bandwidth and others
before communication. By using this value
for the QoS function, optimum QoS control
is available from the beginning of the
communication.
Bonding
*
Bonding is one of the Inverse Multiplexing
methods allowing the connection of the
communication system with multiple ISDN
lines. Dialing the first ISDN line enables you
to connect all other lines. Dialing the second
and later lines is done automatically by the
communication between the communication
systems on both sites. To use bonding, it is
required that both communication systems
be equipped with the bonding function and
that “Area Code” and “Local Number” in the
ISDN Setup menu of the answering site be
set correctly. As the communication
between the systems when using the
bonding function is made via the ISDN
numbers of the answering site, the “Area
Code” and “Local Number” settings in the
ISDN Setup menu are not essential at the
dialing site.
*
Bonding (Bandwidth on Demand
Interoperability Group) is a registered
trademark of THE BONDING
CONSORTIUM.
BRI
An abbreviation for Basic Rate Interface.
Basic interface standardized by the ITU-T.
Single ISDN has two B channels and one D
channel.
Codec
An abbreviation for Coder-Decoder. An
integrated device of a coder that converts an
analog audio/video signal to a digital data
stream and compresses it, and a decoder for
expanding to restore the original analog
signal.
DHCP
An abbreviation for Dynamic Host
Configuration Protocol. Manages IP
addresses in the network.
DNS
An abbreviation for Domain Name System.
Defines the domain name system.
Echo Canceller
Device to eliminate echo that occurs when
transmitting audio.
FEC
An abbreviation for Forward Error
Correction. Error control method in which
the receiver can correct errors without
requesting a retransmission from the
transmitter.
Frame rate
The number of frames which can be
encoded/decoded in one second.
G.711
Audio encoding/decoding format
recommended by the ITU-T. A phone
bandwidth audio signal is converted to a
digital signal with a data rate of 64 Kbps. It
can be transmitted with a data rate of 56
Kbps.
G.722
Audio encoding/decoding format
recommended by the ITU-T. A 7-kHz
bandwidth audio signal is converted to a
digital signal with a data rate of 48 Kbps, 56
Kbps or 64 Kbps.
G.728
Audio encoding/decoding format
recommended by the ITU-T. A phone
bandwidth audio signal is converted to a
digital signal with a data rate of 16 Kbps.
