[Asterisk-Users] What is acceptable network latency for voip connection?

[Michael Graves]

I once read that by PSTN standards a good connection should be less
than 150 ms. I think it was an older Network World review of voip
phones. The real issue is due the callers step on each others speaking
due to latency.

Michael

On Sat, 8 Jan 2005 21:41:37 +0800, David Liu wrote:

>Assuming the network loading is fairly constant, 300ms latency is actually not
>noticeable unless you put both phones next to your ears to compare.  
>
>Latency affects delay while network loading affects voice quality (e.g. break
>ups) If the either end of your network is experiencing very bursty traffic
>patterns, then even a small latency won't necessarily guarrantee good sound
>quality.  
>
>David Liu
>Hong Kong
>
>On Sat, 8 Jan 2005 14:26:10 +0100, Wilson Pickett wrote
>> > I would like to know what would be acceptable latency
>> > on a connection to the termination server( but still
>> > having good quality voice )
>> 
>> It's pretty hard to answer that except with a subjective 
>> appreciation. I have had very good one hour talks with the figure 
>> being 250-350 for the distant user measured by * and 30-60 for me. 
>> There are almost always occasional breakups but I think they have 
>> more to do with network loading on one end of the other.
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--
Michael Graves                           mgraves at pixelpower.com
Sr. Product Specialist                          www.pixelpower.com
Pixel Power Inc.                                 mgraves at mstvp.com

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