From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-x22e.google.com (mail-ob0-x22e.google.com [IPv6:2607:f8b0:4003:c01::22e]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 8E8FA21F1F0 for ; Tue, 28 Apr 2015 07:07:00 -0700 (PDT) Received: by oblw8 with SMTP id w8so108954241obl.0 for ; Tue, 28 Apr 2015 07:06:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=qlvcPHIb0tPPPFAvlr0Bk0eClb2P6c/K3SH/mSv7s/w=; b=zRkyoaJWbnPWa5qsGVUr80LHoopVhHNl+7+eSmr1lUU9gTbFcrvD6a1MORWjCvKSUt 9MF0MQmMbClqKuCQyM3furPwuJ74bSlCVmrtg7xGJtRn+++xwGi0D+CfBKwvXrwAFNjK VkrewMoq6104dOISbcCYSt5hBIsVYeHxCy/t+YKP4yNiu6NWb002jizOYgtWvIIzmknp hz7zvYvpodgwhN7Ycg4tY5YxT/3O0EPJQlQKNUM1T2/w0NbsRZmjOEQ8eVAZkidOZhJ0 ZEQVwoxMQnJ0K5H4dEtQje9ESQUyuhY0/eSVWa/PitaE/l9JPxHwIiQWnvY+NQ9jh4es vdWQ== MIME-Version: 1.0 X-Received: by 10.202.227.130 with SMTP id a124mr13912533oih.59.1430230018762; Tue, 28 Apr 2015 07:06:58 -0700 (PDT) Received: by 10.202.71.139 with HTTP; Tue, 28 Apr 2015 07:06:58 -0700 (PDT) In-Reply-To: References: <5537CDB7.60301@orange.com> <1429722979.18561.112.camel@edumazet-glaptop2.roam.corp.google.com> <5537DA20.1090008@orange.com> <5537DE4D.8090100@orange.com> <553882D7.4020301@orange.com> <1429771718.22254.32.camel@edumazet-glaptop2.roam.corp.google.com> <6C0D04CF-53AA-4D18-A4E4-B746AF6487C7@gmx.de> <87wq123p5r.fsf@toke.dk> <2288B614-B415-4017-A842-76E8F5DFDE4C@gmx.de> <553B06CE.1050209@superduper.net> <14ceed3c818.27f7.e972a4f4d859b00521b2b659602cb2f9@superduper.net> <0C930D43-A05B-48E2-BC01-792CAA72CAD1@gmx.de> <1D70AD75-F177-4146-A4D6-2FD6DB408B63@gmx.de> Date: Tue, 28 Apr 2015 07:06:58 -0700 Message-ID: From: Dave Taht To: Mikael Abrahamsson Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: bloat Subject: Re: [Bloat] DSLReports Speed Test has latency measurement built-in X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Apr 2015 14:07:30 -0000 On Tue, Apr 28, 2015 at 4:04 AM, Mikael Abrahamsson wrot= e: > On Tue, 28 Apr 2015, David Lang wrote: > >> Voice is actually remarkably tolerant of pure latency. While 60ms of >> jitter makes a connection almost unusalbe, a few hundred ms of consistan= t >> latency isn't a problem. IIRC (from my college days when ATM was the new= , >> hot technology) you have to get up to around a second of latency before >> pure-consistant latency starts to break things. > > > I would say most people start to get trouble when talking to each other w= hen > the RTT exceeds around 500-600ms. > > I mostly agree with > http://www.cisco.com/c/en/us/support/docs/voice/voice-quality/5125-delay-= details.html > but RTT of over 500ms is not fun. You basically can't have a heated > argument/discussion when the RTT is higher than this :P Thx for busting me up this morning! But what you say is not strictly true. When the RTT goes way, way, way up (as in email) it becomes much more possible to have an unresolvable heated argument that cannot be shut down down without invocation of godwin's law. Short RTTs (as in personal meetings - and perhaps, one day in a more bloat-free universe without annoying jitter), make it both more possible to have a heated argument... and a resolution. A shared beer, helps too, also. :) > -- > Mikael Abrahamsson email: swmike@swm.pp.se > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat --=20 Dave T=C3=A4ht Open Networking needs **Open Source Hardware** https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67