Auerswald COMpact 3000 analog Installation, Operation And Configuration Instructions page 568

Glossary
Terminology and Functions
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IP Address
In order to ensure that the data packets reach the correct recipients, all of the devices in a TCP/
IP network require a unique address, known as the IP address. IP addresses comprise four
numbers between 0 and 255 that are separated by a point, for example, 192.168.0.14. The
network addresses are divided up into different classes (Class A to C) depending on how many
computers can be located in a network.
Certain ranges are reserved for the operation of local networks:
– Class A: 10.x.x.x (for networks with up to 16.5 million PCs)
– Class B: 172.16.x.x to 172.31.x.x (for networks with up to 65534 PCs)
– Class C: 192.168.0.x to 192.168.255.x (for networks with up to 254 PCs)
These addresses have no validity on the Internet; this means that data packets with this kind
of sender or recipient address cannot be transported on the Internet. However, they can be
used in local networks without restriction. The advantage of this is that if data from a local
network configured in this way comes in contact with the Internet, none of the data on the
computers in the local network can leak out or be accessed externally.
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Jitter Buffer
The jitter buffer buffers RTP packages, to compensate irregular transfer rates of the Internet.
A high jitter buffer reduces short interruptions during the call. In return the delay of the RTP
packages increases.
L
LAN
The LAN (Local Area Network) connects computers over company or home networks.
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COMpact 3000 analog/ISDN/VoIP - Firmware Version 4.0 - Version of the Manual 03 02/11