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Glossary
Gigaset S675/S685 IP / GBR / A31008-xxxx-xxxx-x-xxxx / glossary.fm / 5/18/09
Ve
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ion 8,
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.09
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8
G
G.711 a law, G.711 µ law
Standard for a
.
G.711 delivers a very good voice quality that corresponds to that in the ISDN
fixed line. As there is little compression, the necessary bandwidth is around 64
kbit/s per voice connection, but the delay caused by coding/decoding is only
approx. 0.125 ms.
"a law" describes the European standard and "µ law" describes the North Amer-
ican/Japanese equivalent.
G.722
Standard for a
.
G.722 is a
broadband
language codec with a bandwidth of 50 Hz to 7 kHz, a
net transfer rate of 64 kbit/s per language connection and integrated speech
pause recognition and comfort noise generation (silence suppression).
G.722 delivers very good voice quality. A higher sampling rate provides clearer
and better voice quality than other codecs and enables a speech tone in High
Definition Sound Performance (HDSP).
G.726
Standard for a
.
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
.
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
, e.g. a router as an Internet gateway.
to the telephone network, a gateway has to be con-
nected to the IP network and the telephone network (gateway/VoIP provider).
It forwards calls from VoIP to the telephone network as required.
Gateway provider
.
Global IP address
.
GSM
Global System for Mobile Communication
Originally, European standard for mobile networks. GSM can now be described
as a worldwide standard. However, national standards in the USA and Japan
had been more frequently supported up until now.
