Operation Manual

Glossary
FRITZ!Box Fon WLAN 7570 vDSL 153
Provider. The process of automatic configuration via TR-069
is initiated by the ADSL terminal device. First the user en-
ters a security key and then the settings are retrieved from
the Auto Configuration Server and implemented in the AD-
SL terminal device without any further interaction with the
user. During this process all of the communication between
the ADSL terminal device and the Auto Configuration Server
takes place in encrypted form.
Traffic shaping Traffic shaping is a technology for the optimization of ca-
pacity loads in a communication connection. Especially for
asymmetrical DSL connections, using traffic shaping can
prevent that a download is delayed or blocked by high up-
load traffic.
Data transfer in the Internet is generally based on the
TCP/IP protocol, which waits for the remote site to confirm
reception after sending one or more data packets. Addition-
al data packets are not sent until this confirmation of recep-
tion arrives. If no confirmation arrives over a longer period
of time, the non-confirmed data packets are transmitted
again. The dispatch of such a confirmation can be delayed,
for instance, because the bandwidth for transfer (upload) is
already being used by the data packets of other applica-
tions. But since the remote site does not signal the recep-
tion of the expected confirmation packets until after they
have arrived, this could cause noticeable delays in render-
ing a requested web site or a drop in the throughput rate of
a download. In the worst-case scenario, the remote site will
abort transmission after several apparently unsuccessful
attempts to transfer the data packets. Typical causes for
such a blockade situation include sending an e-mail mes-
sage or the use of a program for private data exchange (also
known as file sharing or peer-to-peer software).
Through traffic shaping these delays are avoided by provid-
ing the dispatch of confirmation packets with bandwidth
suitable for the given download activities. All of the packets
to be sent are also assigned a priority suitable for their
packet types.