A31003-D3000-M100-02-76A9, 11-2013
OpenScape Desk Phone IP V3R3, Phone Administration, Administrator Documentation
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Glossary
Example Dial Plan
DNS
Domain Name System. Performs the translation of network domain names and
computer hostnames to IP addresses.
DTMF
Dual Tone Multi Frequency. A means of signaling between a phone and e. g. a
voicemail facility. The signals can be transmitted either in-band, i. e. within the
speech band, or out-band, i. e. in a separate signaling channel.
E
EAP
Extensible Authentication Protocol. An authentication framework that is
frequently used in WLAN networks. It is defined in RFC 3748.
F
FTP
File Transfer Protocol. Used for transferring files in networks, e. g., to update
telephone software.
G
G.711
ITU-T standard for audio encoding, used in ISDN and VoIP. It requires a 64 kBit/
s bandwidth.
G.722
ITU-T standard for audio encoding using split band ADPCM. The audio bandwidth
is 7 kHz at a sampling rate of 16 kHz. There are several transfer rates ranging
from 32 to 64 kBit/s, which correspond to different compression degrees. The
voice quality is very good.
G.729
ITU-T standard for audio encoding with low bandwidth requirements, mostly used
in VoIP. The standard bitrate is 8 kBit/s. Music or tones such as DTMF or fax tones
cannot be transported reliably with this codec.
Gateway
Mediation components between two different network types, e. g., IP network and
ISDN network.
GUI
Graphical User Interface.
H
HTTP
Hypertext Transfer Protocol. A standard protocol for data transfer in IP networks.
