Tue, June 21, 2016

Why Quality of Service for VoIP?

What exactly is QoS?

QoS, or Quality of Service, refers to the ability for the network to prioritize specific data traffic over other less important data. This allows for certain applications or systems to perform optimally without interference. Otherwise, any voice and data that is transmitted is only at best – effort, which may cause issues with audio and video quality.

How does QoS relate to VoIP business phone systems?

Especially in VoIP (Voice over IP), it is very important to establish QoS in order to have a clear voice connection. Without it, “jitters” or delays in voice traffic as well as echoing and data packet loss are very common and can quickly cause frustration for users in communicating with one another. As Cisco explains in this article, in order to differentiate types of traffic from one another, they must be assigned classes or marked. This will then communicate to the network devices, such as routers and switches, what level of priority is assigned. For instance, you will want to classify traffic based on voice or data for VoIP systems to prioritize voice – this improves the quality of the call and overall VoIP system performance.

What about Bandwidth and Quality of Service?

Sufficient network bandwidth is the foundation of a successful VoIP system. Without this the ability for real-time voice traffic to travel across the network becomes very difficult, resulting in delays and packet loss as mentioned above,


If you would like more information about how you can establish QoS for your VoIP system, please contact Centrality today!

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