NB9/NB9W ADSL2+ VoIP Router 55
YML790 Rev8
Advanced > QoS
Quality of Service offers a defined level of performance in a data communications system - for example the
ability to guarantee that voice traffic is given priority over other network traffic to ensure that conversations are
not disrupted by other network requirements. This means that should you be talking via the VoIP facility and
someone else in the house starts downloading a big file, the download won’t disrupt the flow of voice data.
To add a new QoS rule, click the Add button and enter the necessary information.
QoS controls allow you to assign priority to different data types according to their TOS flag.
Field Enter
Traffic Class Name Create a descriptive Rule Name i.e. ‘VoIP’
Priority Assign High Priority to VoIP
IP Precedence Leave blank unless advised by VSP or Network Administrator
IP Type of Service Leave blank unless advised by VSP or Network Administrator
Protocol UDP
Source IP Address LAN IP address of NB9/NB9W i.e. 192.168.1.1
Source Subnet Mask Source Subnet Mask of same i.e. 255.255.255.0
Source Port Leave blank unless advised by VSP or Network Administrator
Destination IP Address Leave blank unless advised by VSP or Network Administrator
Destination Subnet Mask Leave blank unless advised by VSP or Network Administrator
Destination Port Leave blank unless advised by VSP or Network Administrator
802.1p Priority Leave blank unless advised by VSP or Network Administrator