Operating Instructions and Installation Instructions

Glossary
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NAT
short for Network Address Translation
NAT is a technique used within IPv4 networks. NAT is used in
routers to replace the address information in data packets
with new address information. A typical application for NAT is
routers that connect local networks with the Internet. In local
networks, every network device has a private IP address,
while generally there is only one public IP address available
for the Internet. To grant the network devices access to the In-
ternet, the router replaces the private IP address of the send-
er with its own public IP address in all outgoing data packets.
The router saves all necessary information in a table so that
incoming data packets can then be assigned to the correct
network device.
NTBA
short for Network Termination for ISDN Basic Rate Access
The NT is the network termination device on the ISDN basic
rate terminal. The ISDN terminal devices are connected to the
NT, for instance the ISDN telephone system (PBX) or ISDN
telephones.
public IP address
A public IP address is an IP address (see glossary) valid in the
Internet. Every computer or router participating in the Internet
must have a uniquely assigned public IP address. This ad-
dress is usually negotiated dynamically with the Internet ser-
vice provider when a connection to the Internet is dialed. The
Internet service provider assigns the negotiated IP address to
the computer or router for the duration of an Internet session.
port
So that a single network connection on a computer can be
used by multiple applications to exchange data with remote
sites at the same time, a computer administers what are
known as ports for the IP-based protocols TCP and UDP. Ports
substantiate the point of access for the data packets