Template Module, Version 2.2, 15.11.2022 / Version - 07.07.2020
Network
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Quality of Service (QoS)
The sound quality depends on the priority of the voice data on the network. The VoIP data
packets are prioritised 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 packages contain the signalling
data, whereas the RTP (Real-time Transport Protocol) is used for the voice data transmission.
On the web interface
Settings Network LAN Quality of Service (QoS) in the fields SIP ToS / Diff-
Serv and RTP ToS/DiffServ, enter the required QoS values (value range: 0 to 63)
Common values for VoIP (default setting):
Network security
Setting up HTTP authentication
HTTP authentication authorises a user to access the telephone's web interface by entering a user
name and password.
On the web interface
Settings Network Security HTTP authentication enter HTTP Digest -
Username enter HTTP Digest - Password Save
Manage certificates
The phone supports the establishment of secure (encrypted) data connections on the internet
with the TLS security protocol (Transport Layer Security). With TLS, the client (the telephone)
uses certificates to identify the server. The electronic identity of communication partners is certi-
fied with the help of the certificates. These certificates must be stored on the phone.
There are server and client certificates. The operator of a website is authenticated by the client
with server certificates. The client identifies itself as authorised to access the website of a server
with a client certificate.
SIP 34 High service class for fast switching of the data flow (accelerated process)
RTP 46 Highest service class for fast forwarding of data packets (accelerated forwarding)
Do not change these values without first contacting your network operator.
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.