Operating Instructions and Installation Instructions

Glossary
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ADSL2+ (G.992.5) is a further development of the ADSL stan-
dard.
ADSL2+ offers a doubled frequency range used for down-
stream transmission, and thus double the maximum band-
width achievable for downstream to 24 Mbit/s.
ADSL2+ is completely downward compatible, meaning that
terminal devices compliant with ADSL and ADSL2 can also be
operated on ADSL2+ lines, although they cannot exploit the
advantages of ADSL2+.
DDNS
short for Dynamic Domain Name System
DDNS is a service which allows a computer always to be
reached under the same domain name despite constantly
changing public IP addresses. This means the home network
can always be reached from the Internet, regardless of the us-
er’s location. Even private users have an economical way of
placing their own Internet offers on their computer at home.
Every time the Internet connection is established, the Internet
service provider assigns a new public IP address.
Each time the IP address changes, the current IP address is
transmitted to a special DDNS server. Except for the few sec-
onds between the cancellation of the old IP address and the
notification of the new IP address, the computer can always
be reached at the selected domain name.
default gateway
Gateway (see glossary)
DHCP
short for Dynamic Host Configuration Protocol
DHCP is a protocol for dynamically negotiating the operating
parameters of the TCP/IP protocol (see glossary). The com-
puters in a local IP network (DHCP clients) access the DHCP
server as part of their operating systems’ start procedure.