I have 300ms delay when I ping from Montreal to Shanghai. Does it mean that I am not going to be able to send calls over the WAN with an acceptable quality? Is this only because of the distance or I don't have the right exquipments? Is there any solution to reduce the delay?
I don't think there is anything wrong with your equipment, there is nothing that you can do to reduce delay even if you have a direct fiber connection to Shanghai. That's just how fast light can travel across the world. What type of WAN link do you have to Shanghai ?
I think you'll be fine just make sure that QoS is configured correctly and enabled on both your WAN router as well as your WAN provider.
I have a link to India and a link to Beijing and my average round trip delay is between 290-300 ms and I am sending both voice and video across the WAN and all is working fine so far.
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