Voice Qos - Yealink T46G Administrator's Manual

Voice QoS

In order to make VoIP transmissions intelligible to receivers, voice packets should not be
dropped, excessively delayed, or made to suffer varying delay. DiffServ model can guarantee
high-quality voice transmission when the voice packets are configured to a higher DSCP value.
SIP QoS
SIP protocol is used for creating, modifying and terminating two-party or multi-party sessions.
To ensure good voice quality, SIP packets emanated from Skype for Business phones should be
configured with a high transmission priority.
DSCPs for voice and SIP packets can be specified respectively.
Note
For voice and SIP packets, the Skype for Business phone obtains DSCP info from the network
policy if LLDP feature is enabled, which takes precedence over manual settings. For more
information on LLDP, refer to
Procedure
QoS can be configured using the configuration files or locally.
Configuration File
Local
Details of Configuration Parameters:
network.qos.rtptos
Description:
Configures the DSCP (Differentiated Services Code Point) for voice packets.
The default DSCP value for RTP packets is 46 (Expedited Forwarding).
Note: If you change this parameter, the Skype for Business phone will reboot to make the
change take effect.
LLDP on page 232.
<y0000000000xx>.cfg
Web User Interface
Parameters
Configuring Advanced Features
Configure the DSCPs for voice
packets and SIP packets.
Parameters:
network.qos.rtptos
network.qos.signaltos
Configure the DSCPs for voice
packets and SIP packets.
Navigate to:
http://<phoneIPAddress>/serv
let?p=network-adv&q=load
Permitted Values
Integer from 0 to 63
Default
46
247