User's Manual

Table Of Contents
229
Glossary
S675IP / USA-CAN eng / A31008-xxxx-xxxx-x-xxxx / glossary.fm / 30.04.2009
Version 8, 03.09.2008
GSM Global System for Mobile Communication
Originally, a 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 headphone. A headset makes using the
speaker more convenient. There are headsets available that can be connected
to the handset by a cable.
HTTP Proxy Server via which the Network subscribers can process their Internet traffic.
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 sub-
scribers.
See also:
Gateway, Router.
I
IEEE Institute of Electrical and Electronics Engineers
International body that defines standards in electronics and electro-technol-
ogy, concerned in particular with the standardization of LAN technology, trans-
mission protocols, data transfer rate and wiring.
Infrastructure network
Network with central structure: All Network 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.
Each
Network subscriber is identifiable via his 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 transfers data from the sender to the recip-
ient. IP determines the paths (routing) along which the data packets travel.