Information about the importance of Quality of Service (QoS) in VoIP and tips on how to increase call quality
When there is instability in your network some initial information can get lost in transit which results in gaps in the conversation, call drops, and/or degradation in the quality of a call.
In order to avoid this, specific settings can be applied to your router in order to prioritize voice traffic over lower-priority traffic on your network. These settings are most known as QoS. Keep in mind that even if you have a good bandwidth, the stability of your internet network is very important too!
If your router allows voice packet prioritization via QOS, we strongly suggest enabling this for LimePhone. For prioritization, we suggest using our IP ranges and ports according to our guide here.
You can set up QoS rules from your router's interface using the media server IP addresses. You should set up all of the relevant addresses that correspond to your location.
We recommend not using a VPN as this will likely negatively affect audio quality. If you do need to use a VPN, you can exclude the voice traffic using the IP addresses listed for QoS.
All packets coming in and out of the LimePhone application carry a DSCP tag with the value 46 (EF 101110), which can then be used when configuring the QoS to give priority to voice packets over general traffic.
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