what is acceptible jitter for voip and videoconferencing?

Wed Sep 20 14:03:00 UTC 2023

I think it all goes back to the earliest MOS tests ("Hold up the number of fingers for how good the sound is") and every once in a while somebody actually does some testing to look for correlations.

Thought it's 15 years old, I like this thesis for the writer's reporting: https://scholarworks.gsu.edu/cgi/viewcontent.cgi?article=1043&context=cs_theses

In particular, this table shows the correlation, and is consistent with what I would expect.
[cid:image001.png at 01D9EBA9.A25944E0]

Lee

From: NANOG <nanog-bounces+leehoward=hilcostreambank.com at nanog.org> On Behalf Of Dave Taht
Sent: Tuesday, September 19, 2023 8:12 PM
To: NANOG <nanog at nanog.org>
Subject: what is acceptible jitter for voip and videoconferencing?

This message is from an EXTERNAL SENDER - be CAUTIOUS, particularly with links and attachments.

Dear nanog-ers:

I go back many, many years as to baseline numbers for managing voip networks, including things like CISCO LLQ, diffserv, fqm prioritizing vlans, and running
voip networks entirely separately... I worked on codecs, such as oslec, and early sip stacks, but that was over 20 years ago.

The thing is, I have been unable to find much research (as yet) as to why my number exists. Over here I am taking a poll as to what number is most correct (10ms, 30ms, 100ms, 200ms),

https://www.linkedin.com/feed/update/urn:li:ugcPost:7110029608753713152/

but I am even more interested in finding cites to support various viewpoints, including mine, and learning how slas are met to deliver it.

--
Oct 30: https://netdevconf.info/0x17/news/the-maestro-and-the-music-bof.html
Dave Täht CSO, LibreQos
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