Avaya IP Telephony Guide de configuration Page 134

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134 Glossary
P0937663 03.1
G.729
A codec that provides near toll quality at a low delay. Uses compression to 8 kbit/s (8:1
compression rate).
G.723.1
A codec that provides the greatest compression, 5.3 kbit/s or 6.3 kbit/s. Normally used for
multimedia applications such as H.323 videoconferencing. Allows connectivity to
Microsoft-based equipment.
H.323
The ITU standard for multimedia communications over an IP network. Business
Communications Manager IP Telephony supports H.323.
Hub
Center of a star topology network or cabling system.
IEEE802 ESS
This is the LAN and switch standard used to define the connection between the access
point and the NetVision handset onto the network. The handset is given the ID code of the
device(s) with this standard so the access points recognize them.
kbit/s
kilobits per second. Thousands of bits per second.
Latency
The amount of time it takes for a discrete event to occur.
Mbit/s
Megabits per second. Millions of bits per second.
Modem
Device that converts serial data from a transmitting terminal to an analog device for
transmission over a telephone channel. Another modem converts the signal to serial digital
Noise
Nortel NetVision Phone Administrator (NVPA)
This is the Business Communications Manager-specific application that is used to
configure features and system information into the NetVision handsets. This application is
included on the Business Communications Manager database.
Packet
Group of bits transmitted as a complete package on a packet switched network.
Packet switched network
A telecommunications network based on packet switching technology. A link is busy for
the duration of the packets.
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