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FXS
Foreign Exchange Station. Phone port to which an analogue terminal (phone, fax or
answer machine) can be connected.
Gateway
A gateway connects networks with one another. In contrast to a Router, a gateway is not
dependent on protocol, i.e. it is also able to establish connections between networks
with a different architecture (protocols, application interfaces etc.).
Half duplex
Operating mode for data transfer. Only one party can receive or send data at a time.
HTTP
Hypertext Transfer Protocol. Network protocol for the transmission of data, which is
mainly used for transmitting and displaying Internet content.
HTTP proxy
An
HTTP
proxy is a server that network components use for their Internet traffic. All
requests are sent via the proxy.
Hub
A hub is a central distribution point in a network, to which PCs and other network
devices are connected. The hub forwards received data to all connected PCs. For this
reason, in large networks, a
the PC requesting it.
IEEE
Institute of Electrical and Electronics Engineers. The IEEE is an international body for
defining network standards, especially for standardising
sion protocols and speeds, and wiring.
IEEE 802.16
Standard defined by the
(e.g. 802.3 Ethernet, 802.11 WLAN), the WiMAX standard is one of the standards for
networks. The standard has progressed in accordance with new developments; there
are currently two main versions:
u
IEEE 802.16-2004: WiMAX, which specifies the secure location for connection part-
ners.
u
IEEE 802.16e-2005: Mobile WiMAX, which enables wireless cells to be exchanged
during data transmission.
IP
Internet Protocol. The protocol is responsible for addressing of subscribers in a network
using IP addresses, and routes data from the sender to the recipient. In doing so, it
decides on the way in which data packets will be forwarded between sender and recip-
ient.
Switch
is recommended to ensure that data is only sent to
IEEE
for WiMAX. Similarly to other standards in the 802 series
LAN
technologies, transmis-
Glossary
65
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