[cisco-voip] Silly question...
Jonathan Charles
jonvoip at gmail.com
Fri Feb 29 18:10:48 EST 2008
Maybe I should be more clear.
What is the Cisco-recommended best-practice for maximum round trip
delay for a Cisco IP Telephony deployment.
And the answer is apparently 150ms each way... that is still nuts.
I am wondering why most of us think it was 150ms round trip... this
isn't isolated to a few of us, I asked all of the engineers I work
with and every one of them (including two CCIEs) told me it was 150ms
round trip....
Now, I found a doc on Cisco's website saying 150ms each way... so, 300ms...
Jonathan
On Fri, Feb 29, 2008 at 5:05 PM, Bill Woodcock <woody at pch.net> wrote:
> > OK, here's the thing.
> > This morning, if you had asked me this question, I would have bet
> > serious amounts of cash that the MAXIMUM ROUND TRIP DELAY was 150ms.
> > Now, I am seeing that it is ONE WAY, with a maximum of 300ms round
> > trip... that is insane.
>
> I've been on triple-satellite-hop calls with more than four seconds of
> delay. And obviously, astronauts and cosmonauts have no trouble phoning
> home. It's all a matter of conversational turn-taking. People who are
> good at it have no problem, while people who are nervous or impatient
> can't usually deal with it.
>
> -Bill
>
>
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