Gigaset N510 IP PRO Manual page 126

Glossary
G
G.711 a law, G.711 μ law
Standard for a Codec.
G.711 delivers very good voice quality that corresponds to that in the ISDN network.
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 American/
Japanese equivalent.
G.722
Standard for a Codec.
G.722 is a broadband language codec with a bandwidth of 50 Hz to 7 kHz, a net trans-
mission rate of 64 kbit/s per voice connection and integrated speech pause recogni-
tion 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 Codec.
G.726 delivers good voice quality. It is inferior to the quality with codec G.711 but bet-
ter 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
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 previ-
ously more frequently supported.
H
Headset
Combination of microphone and headphone. A headset enables a comfortable
speaker mode. Headsets that can be connected to the base via a cable (wire-bound) or
via Bluetooth (wireless) are available.
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VoIP to the telephone network, a gateway has to be connected