Yealink Yealink SIP-T48G, Administrator'S Manual, Page: 175 / 319

Configuring Advanced Features
163
Details of Configuration Parameters:
Parameters Permitted Values Default
phone_setting.rtcp_xr_report.enable 0 or 1 0
Description:
Enables or disables the IP phone to periodically (every 5 seconds) send RTCP-XR
packets to another participating phone during a call for call quality monitoring and
diagnosing.
0-Disabled
1-Enabled
Note: If you change this parameter, the IP phone will reboot to make the change
take effect. It is only applicable to SIP-T48G IP phones.
Web User Interface:
None
Phone User Interface:
None
Quality of Service (QoS) is the ability to provide different priorities for different packets
in the network, allowing the transport of traffic with special requirements. QoS
guarantees are important for applications that require fixed bit rate and are delay
sensitive when the network capacity is insufficient. There are four major QoS factors to
be considered when configuring a modern QoS implementation: bandwidth, delay,
jitter and loss.
QoS provides better network service through the following features:

Supporting dedicated bandwidth

Improving loss characteristics

Avoiding and managing network congestion

Shaping network traffic

Setting traffic priorities across the network
The Best-Effort service is the default QoS model in IP networks. It provides no
guarantees for data delivering, which means delay, jitter, packet loss and bandwidth
allocation are unpredictable. Differentiated Services (DiffServ or DS) is the most widely
used QoS model. It provides a simple and scalable mechanism for classifying and
managing network traffic and providing QoS on modern IP networks. Differentiated