How to improve the quality of calls

How to improve the quality of calls



The technology used by RingOver
At RingOver, we put everything toward assuring you an optimal call quality. We use the latest technology and our infrastructures are regularly updated. Our telecom solution is based on WebRTC technology (new VoIP solution) and uses the OPUS codec.

What elements influence call quality?


Your network infrastructure, your internet connection, your routers as well as your wifi terminals all contribute to the quality of your calls. It is therefore essential put in place the right network equipment to ensure the optimisation of the 3 most impactful factors:

Latency: this is the time that a “packet” takes to reach its destination. It is measured in milliseconds (ms). Over 150ms, conversation delays can result.
Jitter: this is the variation in latency, which allows measurement of the variation in packet transmission delay. If packets are sent at irregular intervals, audio flow will not be correctly transmitted (for example, during a conversation you’ll hear your correspondent’s voice speed up sometimes). The acceptable limit is approximately 20ms.
Packet loss: this happens when the network is unstable or overloaded. In this case the conversation will be choppy with phrases cut off.

Otherwise, there is a much greater chance that you will encounter problems with these 3 factors if you are connected to wifi, especially if your terminal is not optimised.
For multiple reasons:
1/ Because wifi is sensitive to interference (smartphones, microwaves, etc.), characterised during calls by crackling, choppiness, etc.
2/ There may be multiple devices connected to your wifi network that use up bandwidth.
3/ The wifi is not adapted to real-time applications.

We therefore recommend a connection via network cable (Ethernet). You’ll see the difference!
Here’s a tool for measuring the quality of your internet connection (the tests are only performed within a minimal time period) :
https://fast.com

How to optimise quality?


The best solution for optimisation: ask the person who manages your company’s network to put QoS (flow prioritisation) in place. It informs your router that flow to/from RingOver servers take priority over other internet traffic.
Please consult the following article, in which you’ll find our IP addresses:
https://www.ringover.com/en/support/technical-recommendations/what-are-the-ports-to-open-on-my-router-and-how-do-i-prioritise-flow
Also, we recommend to prioritise audio packets in Windows :
https://www.ringover.com/en/support/technical-recommendations/apply-qos-on-windows

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