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Gigaset N870 IP PRO / Admin IE-UK-International en / A31008-XXXXX-XXXX-X-XX / settings_telephony.fm / 8/10/21
Template Module, Version 2.1, 11.08.2020 / Template Basiseinstellungen: Version 3.1 - 07.07.2020
Telephony settings
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Security settings
The phone system supports the establishment of secure voice connections over the internet via
TLS certificates. Thereby, public and private keys are used to encrypt and decrypt the messages
that are exchanged between SIP entities. The public key is contained within the certificate of an
IP entity and is available for everyone. The private key is kept secret and is never revealed to
anyone. The server certificate and the private key must be uploaded to the base stations.
Click on Browse... and choose the file containing the certificate or the private key from the
file system of your computer or network click on Upload . . . the file is uploaded and
shown in the appropriate list.
SIP security password
If your private key is protected by a password, enter it here.
Quality of Service (QoS)
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 contain the signalling
data, while RTP (Real-time Transport Protocol) is used for the voice transfer.
Enter your chosen QoS values in the SIP ToS / DiffServ and RTP ToS / DiffServ fields. Value
range: 0 - 63.
Common values for VoIP (default setting):
Audio quality
The phone system allows the user to make calls with excellent voice quality using the wideband
codec G.722. One base station enables a maximum of five wideband calls.
The page allows you to enable/disable the use of the wideband codec G.722 for the telephone
system.
Settings Telephony Audio
Mark/unmark the check box to enable/disable wideband calls
Click on Set to save the settings of this page.
SIP 34 High service class for fast switching of the data flow (Expedited Flow)
RTP 46 Highest service class for fast forwarding of data packets (Expedited Forwarding)
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.
It is only available in the Integrator user interface for the user role admin.
To allow users to make wideband calls, the codec G.722 must have been activated for
the provider profile that is used for the connection ( p. 69).
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