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From: Simon Barber <simon@superduper.net>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Sina Khanifar <sina@waveform.com>, <sam@waveform.com>,
	bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Updated Bufferbloat Test
Date: Thu, 25 Feb 2021 05:53:36 -0800	[thread overview]
Message-ID: <177d9776300.27a9.e972a4f4d859b00521b2b659602cb2f9@superduper.net> (raw)
In-Reply-To: <alpine.DEB.2.20.2102251445030.21306@uplift.swm.pp.se>

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So perhaps this can feed into the rating system, total latency < 50mS is an 
A, < 150mS is a B, 600mS is a C or something like that.

Simon

On February 25, 2021 5:49:26 AM Mikael Abrahamsson <swmike@swm.pp.se> wrote:

> On Thu, 25 Feb 2021, Simon Barber wrote:
>
>> The ITU say voice should be <150mS, however in the real world people are
>> a lot more tolerant. A GSM -> GSM phone call is ~350mS, and very few
>> people complain about that. That said the quality of the conversation is
>> affected, and staying under 150mS is better for a fast free flowing
>> conversation. Most people won't have a problem at 600mS and will have a
>> problem at 1000mS. That is for a 2 party voice call. A large group
>> presentation over video can tolerate more, but may have issues with
>> talking over when switching from presenter to questioner for example.
>
> I worked at a phone company 10+ years ago. We had some equipment that
> internally was ATM based and each "hop" added 7ms. This in combination
> with IP based telephony at the end points that added 40ms one-way per
> end-point (PDV buffer) caused people to complain when RTT started creeping
> up to 300-400ms. This was for PSTN calls.
>
> Yes, people might have more tolerance with mobile phone calls because they
> have lower expectations when out and about, but my experience is that
> people will definitely notice 300-400ms RTT but they might not get upset
> enough to open a support ticket until 600ms or more.
>
> --
> Mikael Abrahamsson    email: swmike@swm.pp.se


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  reply	other threads:[~2021-02-25 13:53 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-24 18:22 Sina Khanifar
2021-02-24 22:10 ` Dave Taht
2021-02-24 23:39   ` Simon Barber
2021-02-25  5:56   ` Sina Khanifar
2021-02-25  7:15     ` Simon Barber
2021-02-25  7:32       ` Sina Khanifar
2021-02-25 13:38         ` Simon Barber
2021-02-25 13:43           ` Dave Taht
2021-02-25 13:49           ` Mikael Abrahamsson
2021-02-25 13:53             ` Simon Barber [this message]
2021-02-25 19:47               ` Sina Khanifar
2021-02-25 19:56                 ` Simon Barber
2021-02-25 20:10                   ` Sina Khanifar
2021-02-25 20:52                     ` Simon Barber
2021-02-25 20:53                     ` Simon Barber
2021-02-25 13:46         ` Simon Barber
2021-02-25  7:20     ` Simon Barber
2021-02-25 10:51     ` Sebastian Moeller
2021-02-25 20:01       ` Sina Khanifar
2021-02-25 20:14         ` Sebastian Moeller
2021-02-26  1:06           ` Daniel Lakeland
2021-02-26  8:20             ` Sina Khanifar
2021-02-26 17:25               ` Michael Richardson
2021-02-24 22:15 ` Kenneth Porter
2021-02-25  5:29   ` Kenneth Porter
2021-02-25  5:35     ` Dave Taht
2021-02-25  6:24       ` Kenneth Porter
2021-02-25  1:16 ` David Collier-Brown
2021-02-25  6:21   ` Sina Khanifar
2021-02-25  4:48 ` Marco Belmonte
     [not found] ` <1D68EF40C3A8A269831408C8@172.27.17.193>
2021-02-25  5:58   ` Sina Khanifar
2021-02-25  9:47 ` Mikael Abrahamsson
2021-02-25 10:49 ` Sebastian Moeller
2021-02-25 20:41   ` Sina Khanifar
2021-02-25 20:50     ` Sina Khanifar
2021-02-25 21:15       ` Sebastian Moeller
2021-02-26  8:23         ` Sina Khanifar
2021-02-26 18:41           ` Sina Khanifar
2021-02-26 19:58             ` Sebastian Moeller
2021-02-25 12:27 ` Toke Høiland-Jørgensen
2021-02-25 14:48   ` Toke Høiland-Jørgensen

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