Siemens HiPath 8000 Manuel d'utilisateur Page 247

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bkglos.fm
A31003-O1010-M100-10-76A9, 13/06/2008
HiPath 8000 - OpenStage Family, Administration Manual
X-1
Nur für den internen Gebrauch Glossary
Glossary X
A
Address of Record (AoR)
A ->SIP ->URI that represents the "public address" of a SIP user resp. a phone or line. The
format is similar to an E-mail address: "username@hostname". (for a definition, see RFC
3261)
ADPCM
Adaptive Differential Pulse Code Modulation. A compressed encoding method for audio
signals which are to be transmitted by a low bandwidth. As opposed to regular
->PCM, a
sample is coded as the difference between its predicted value and its real value. As this
difference is usually smaller than the real, absolute value itself, a lesser number of bits can
be used to encode it.
C
CSTA
Computer Supported Telecommunications Applications. An abstraction layer for telecom-
munications applications allowing for the interaction of ->CTI computer applications with te-
lephony devices and networks.
CTI
Computer Telephony Integration. This term denotes the interaction of computer applica-
tions with telephony devices and networks.
D
DFT
Digital Feature Telephone. A phone with no line keys.
DHCP
Dynamic Host Configuration Protocol. Allows for the automatic configuration of network
endpoints, like IP Phones and IP Clients.
DiffServ
Differentiated Services. Specifies a layer 3 mechanism for classifying and managing net-
work traffic and providing quality of service (->QoS) guarantees on ->IP networks. DiffServ
can be used to provide low-latency, guaranteed service for e. g. voice or video communi-
cation.
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