Quality of Service is a feature of most modern routers that priorities certain types of traffic over others.
For instance, if your VoIP service is sharing the same connection as other general internet usage, your a QoS capable router may prioritise your calls bandwidth requirements over other internet use.
Generally it's not required. VoIP has very small bandwidth requirements and a typical office's internet bandwidth usage won't be enough to cause any issues.
For most business', we generally recommend trying your connection out "as it is" before going down the path of a QoS setup.
Should you experience any issues with your VoIP audio quality - QoS can always be set up later.
If you have a limited connection (such as an ADSL1 connection with low "sync speed") then QoS may be needed.
Please see Bandwidth Requirements for more information.
Unfortunately we don't have a list of routers supporting QoS. Generally speaking, most modern routers, particularly those for NBN services will support it.
Please check your router manufacturers website for details. Some common manufacturers are: Netgear, D-Link, TP-Link and Huwawei.
We generally recommend talking to your IT support people about setting up QoS. It can have other implications for your router and network setup that are outside of the scope of what we can advise on and support.
That said, we're more than happy to help you get started and provide general advice specific to QoS for your VoIP service.