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New Member

Jitter 10ms

What is an acceptable Jitter Rate for an SLA with a service provider?

MY provider is saying that they will guarantee that jitter will not go

above 10 milliseconds and it will be measured in 5 minute intervals.

This is an MPLS network and we will run IP voice over this network.

What amount of Jitter can cause voice communication problems? Is it 8

milliseconds?

Thank You for any responses, all responses are greatly appreciated.

Have a wonderful day.

3 REPLIES
Hall of Fame Super Gold

Re: Jitter 10ms

That depends also by the endpoints you are using. eg the cisco router and telephones can tolerate jitter also of 20 - 30 msec quite well.

New Member

Re: Jitter 10ms

If you know your jitter will be consistent and low, you can set a static jitter buffer on the endpoints. Cisco says their dynamic jitter buffers are good at adjusting the buffer but if you know your jitter limits already you can go with a static buffer as the dynamic buffer is always going to add a little "wiggle room" so it can adapt just in case there is a deviation from the trend.

Here are a few references that can help you:

http://www.futurehardware.in/339875.htm

http://www.ciscopress.com/articles/article.asp?p=606583&seqNum=2

Please rate if this helps.

Re: Jitter 10ms

http://www.juniper.net/solutions/literature/white_papers/mpls_private.pdf

The ITU (International Telecommunication Union) recommends that the one-way, end-toend

delay associated with a voice call does not exceed 150 ms. In addition, jitter should not exceed 40 ms and packet loss

should not exceed 0.5%.

HTH - pls rate all useful posts

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