NEC UNIVERGE SV9100 Manual page 34

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in its G-series recommendations.
G.723.1
Describes a compression technique that can be used for compressing speech or audio signal
components at a very low bit rate as part of the H.324 family of standards. This CODEC has two bit
rates associated with it: 5.3 and 6.3 kbps. The higher bit rate is based on ML-MLQ technology and
provides a somewhat higher quality of sound. The lower bit rate is based on CELP and provides
system designers with additional flexibility. Described in the ITU-T standard in its G-series
recommendations.
G.729
Describes CELP compression where voice is coded into 8-kbps streams. There are two variations of
this standard (G.729 and G.729 Annex A) that differ mainly in computational complexity; both provide
speech quality similar to 32-kbps ADPCM. Described in the ITU-T standard in its G-series
recommendations.
H.323
Extension of ITU-T standard H.320 that enables videoconferencing over LANs and other packet-
switched networks, as well as video over the Internet.
IETF (Internet Engineering Task Force)
One of two technical working bodies in the Internet Activities Board. The IETF meets three times a
year to set technical standards for the Internet
IP
Internet Protocol
Jitter
The variation in the amount of Latency among Packets being received
Latency
(Also called Delay) The amount of time it takes a Packet to travel from source to destination.
Together, Latency and Bandwidth define the speed and capacity of a network.
LAN
A local area network (LAN) is a group of computers and associated devices that share a common
communications line or wireless link and typically share the resources of a single processor or server
within a small geographic area (for example, within an office building).
Packet
In data communication, the basic logical unit of information transferred.
PBX
Private Branch eXchange; An in-house telephone switching system that interconnects telephone
extensions to each other as well as to the outside telephone network.
PSTN
Public Switched Telephone Network; The worldwide voice telephone network.
Packet Switching
Packet switching is a WAN switching method in which network devices share a single point-to-point
link to transport packets from a source to a destination across a carrier network.