Siemens OpenStage 15 Administration Manual

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OpenScape Voice - OpenStage Family, Administration Manual
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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.

Siemens OpenStage 15 Specifications

General

Type	IP Phone
Connectivity	Ethernet
Power over Ethernet (PoE)	Yes
Speakerphone	Yes
Keys	Fixed function keys
Headset Port	Yes
Protocols	SIP
Display	Monochrome display
Audio	G.711, G.729
Power Supply	PoE or external power adapter