Siemens Gigaset S685 IP User Manual page 165

Glossary
Gateway
Connects two different Networks,
e.g. a router as an Internet gateway.
For phone calls from VoIP to the tele-
phone network, a gateway has to be
connected to the IP network and the
telephone network (gateway/VoIP pro-
vider). It forwards calls from VoIP to the
telephone network as required.
Gateway provider
See SIP provider.
Global IP address
See IP address.
GSM
Global System for Mobile Communication
Originally, European standard for
mobile networks. GSM can now be
described as a worldwide standard. In
the USA and Japan national standards
are now more frequently supported
than in the past.
H
Headset
Combination of microphone and head-
phone. A headset makes handsfree
talking more convenient. There are
headsets available that are connected
to the handset by a cable.
HTTP proxy
Server via which the Network sub-
scribers can process their Internet traf-
fic.
Hub
Uses one Infrastructure network to
connect several Network subscribers.
All data sent to the hub by one network
subscriber is forwarded to all network
subscribers.
See also: Gateway, Router.
164
I
IEEE
Institute of Electrical and Electronics Engineers
International body that defines stand-
ards in electronics and electrotechnol-
ogy, concerned in particular with the
standardisation of LAN technology,
transmission protocols, data transfer
rate and wiring.
Infrastructure network
Network with central structure: all Net-
work subscribers communicate via a
central Router.
Instant messaging
Service that uses a client program to
allow chatting in real time, i.e. to send
brief messages to other subscribers on
the Internet.
Internet
Global WAN. A series of protocols have
been defined for exchanging data,
known by the name TCP/IP.
All Network subscribers are identifia-
ble via their IP address. DNS assigns a
Domain name to the IP address.
Important services on the Internet
include the World Wide Web (WWW), e-
mail, file transfer and discussion
forums.
Internet Service Provider
Enables access to the Internet for a fee.
IP (Internet Protocol)
TCP/IP protocol on the Internet. IP is
responsible for addressing subscribers
in a Network using IP addresses and
routes data from the sender to the
recipient. IP determines the paths
(routing) along which the data packets
travel.