Fritz! Fon WLAN 7390 Installation, Configuration And Operation page 190

Glossary
VoIP
WLAN
FRITZ!Box Fon WLAN 7390
abbreviation for Voice over IP, also known as Internet tele-
phony
Voice over IP makes telephone calls possible via the Inter-
net. The technology has already been in use for years, but
today it allows even private customers the convenience fa-
miliar from conventional telephony, usually at significant-
ly lower prices. VoIP has also made it considerably more
convenient to use applications like conference calls and
answering machines in networks. Added to this are global
accessibility under a single telephone number and new
VoIP features like the Buddy List known from chat rooms.
Internet telephony used to be possible only with a head-
set connected to the computers of the callers and their
conversation partners. Today voice connections via the In-
ternet, even to fixed-line and mobile networks, can be
conducted conveniently using VoIP telephone systems
that allow already existing analog telephones to be used
even when the computer is switched off. Various Internet
Service Providers and telephony carriers provide SIP-
fixed-line gateways for this purpose. Such a gateway is
used to produce voice connections between the Internet
and conventional telephone networks. In principle VoIP
conversations are possible via every DSL access point, but
for convenient use with existing terminal equipment, and
for conversations with the fixed-line and mobile networks,
it is important that the DSL provider support what is
known as the SIP standard. SIP is the current standard de-
fined for VoIP by the IETF (Internet Engineering Task Force).
abbreviation for Wireless Local Area Network
The term WLAN designates the industry standard for wire-
less local networks passed by the Institute of Electrical
and Electronics Engineers (IEEE) in 1997 under the title
IEEE 802.11.
By means of WLAN technology, individual computers or
network devices like printers or DSL access points can be
linked wirelessly to an existing cable-connected local net-
work (LAN), or LANs can be converted completely to a
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