Siemens Gigaset DE380 IP R User Manual page 79

Glossary
G.726
Standard for a Codec.
G.726 delivers 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 rather low with G.729A/B. As a result of the high level of
compression, the necessary bandwidth is only around 8 kbit/s per voice con-
nection, 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 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 stand-
ards are now more frequently supported than in the past.
H
Headset
Combination of microphone and headphone. A headset makes handsfree
talking more convenient. Headsets that can be connected to the telephone
via a cable are available.
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 net-
work subscribers.
See also: Gateway, Router.
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