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Community Member

WAN Latency limitations

I am wondering what the limitations of Voice over IP are in respect to Latency. I am looking at a high latency network (around 400ms RTT) due to utilisation and distance, and I am wondering what kind of effects this is going to have

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Community Member

Re: WAN Latency limitations

You’ll probably get voice echo with that kind of latency. Just my thoughts.

Community Member

Re: WAN Latency limitations

You will find that your latency times will be unaccepable for voice traffic. Typically, the "magic number" you want to shoot for is roughly 125mS of latency or better. Although....cisco claims that the last space shuttle that went up used softphone via satellites and it worked fine....I wonder what fine really means?

Community Member

Re: WAN Latency limitations

Agree with the above comments that you'll get delay, but don't forget there's numerous queing techniques you can use to prioritise the voice traffic. Might be worth a try to see how much you can squeeze out of the circuit.

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