Qos Settings - Gigaset DE900 IP PRO User Manual

Configuring phone settings via the Web configurator
Call Manager
Select whether you want to accept calls that are transferred via the Call Manager of the
phone system, directly. You have the following options:
– via Headset
– via Handsfree or
– not at all (No)
Saving settings
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Click on Save to save your settings on the Server and Phone Systems screen.
QoS settings (Quality of Service)
On this screen you can optimise the voice quality of your IP telephone.
The voice quality depends on the priority of the voice data in the IP network. Prioritising
the VoIP data packets is done using the QoS protocol DiffServ (Differentiated Services).
DiffServ defines a number of classes for the quality of service and, within these classes,
various priority levels for which specific prioritisation procedures are defined.
You can specify different QoS values for SIP and RTP packets. SIP packets (Session Initia-
tion Protocol) contain the signalling data, while RTP (Real-time Transport Protocol) is used
for the voice transfer.
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Settings Network and Connections
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Enter your chosen QoS values in the SIP ToS/Diffserv (0..63) and RTP ToS/Diffserv
(0..63) fields. Value range: 0 - 63.
Common values for VoIP (default setting):
SIP 40
RTP 46
Warning
Do not change these values without consulting your network operator first. A higher
value does not necessarily mean a higher priority. The value determines the service
class, not the priority. The prioritisation procedure used in each case meets the
requirements of this class and is not necessarily suitable for transferring voice data.
Detailed information on the Diffserv protocol can be found in RFC 2474 and RFC 3168.
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VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
Highest service class for fast switching of the data flow
(Expedited Flow)
Highest service class for fast forwarding of data packets (Expedited
Forwarding)
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QoS Settings