Gigaset C530 IP Manual page 146

Gigaset C530 IP / LUG - USA en / A31008-XXXXX-XXXX-X-XX / Glossary.fm / 25.03.2015
G.722
Standard for a Codec.
G.722 is a broadband language codec with a bandwidth of 50 Hz to 7 kHz, a net transmission
rate of 64 kbit/s per voice connection and integrated speech pause recognition and comfort
noise generation (silence suppression).
G.722 delivers a very good voice quality. A higher sampling rate provides clearer and better
voice quality than with other codecs and enables a speech tone in High Definition Sound
Performance (HDSP).
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 headphones. A headset makes using handsfree mode more
convenient. Headsets that can be connected to the base via a cable (wire-bound) or via
Bluetooth (wireless) 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 network subscribers.
See also: Gateway, Router.
Glossary
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