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Glossary
Gigaset DE310 IP PRO / en / A31008-M2218-L101-5-7619 / glossary.fm / 27.09.2012
PRO Version 3, 30.05.2012
G.726
Standard for a codec.
G.726 delivers a good voice quality. It is inferior to the quality with codec G.711 but better
than with G.729.
G.729A/B
Standard for a codec.
The voice quality is more likely to be lower with G.729A/B. As a result of the high level of
compression, the necessary bandwidth is only around 8 kbit/s per voice connection, but
the delay is around 15 ms.
Gateway
Connects two different networks, e.g., a router as an Internet gateway.
For phone calls from VoIP to the telephone network, a gateway has to be connected to the
IP network and the telephone network (gateway/VoIP provider). 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, a European standard for mobile networks. GSM can now be described as a
worldwide standard. However, in the USA and Japan, national standards were previously
more frequently supported.
H
Headset
Combination of microphone and headphone. A headset makes using speaker mode more
convenient. Headsets that can be connected to the telephone via a cable are available.
HTTP proxy
Server via which network subscribers can process their Internet traffic.
Hub
Connects several network subscribers in one infrastructure network. All data sent to the
hub by one network subscriber is forwarded to all network subscribers.
See also: Gateway, Router.
I
IEEE
Institute of Electrical and Electronics Engineers
International body that defines standards in electronics and electrical engineering, con-
cerned in particular with the standardisation of LAN technology, transmission protocols,
data transfer rate and wiring.
Infrastructure network
Network with central structure: All network subscribers communicate via a central router.
