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<p class="MsoNormal"><span style="color:#1F497D">Hi guys,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The voice requirements that were used were pretty simple-sounding, something like:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Move a call multiple times between multiple links in response to multiple link failures without losing audio quality or signaling<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Conceal up to 5% packet loss from SIP and RTP on a single link<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Simultaneously meet requirements 1 and 2 for any combination of links<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The requirements sound simple, but you folks know how hard it would be to implement something like this. We had other requirements to deal with our core application and data-center oddities, but those voice
ones can pretty much stand alone.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In retrospect, we might have phrased #2 in terms of “MOS per unit loss”. Something like “Calculated MOS score on a g.711 call can drop no more than 0.1 with 5% packet loss” would have been more measureable than
a subjective ‘can you hear me now’ kind of opinion.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">We wound up going with VeloCloud.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Best advice is to shoot for the moon on your requirements, and test the living daylights out of it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Staying away from all the NDA-breaking geeky stuff, here are warning signs to keep an eye out for:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Vendors that don’t let you run your own pilot. If they insist in being right there with you, their stuff isn’t ready for production.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Over-reliance on fancypants graphs. Amazing graphs are great and all, but not even close to being as important as actually fixing problems.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Scoping assertions. One vendor asserts that “an SDWAN can only be as good as the underlay network” because they simply can’t do error CORRECTION. If you buy off on their assertion, you’re doomed.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Hiding behind “best effort”. Can’t tell you how many times we heard “oh, that feature is just best-effort, it might not work all the time” when we pressed them. For EVERY feature that is important,
be sure that you nail them down what actually works 100% of the time and what they implement as some kind of throw-away ‘best-effort’ slideware feature.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">David<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Paul Stamoulis [mailto:paul@everestbroadband.com]
<br>
<b>Sent:</b> Tuesday, October 03, 2017 2:05 PM<br>
<b>To:</b> Hiers, David <David.Hiers@cdk.com>; voiceops@voiceops.org<br>
<b>Subject:</b> RE: SDWAN for VOIP<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">David, thanks for the info – we are currently looking at this technology as well for services to remote locations and redundancy of network – can you share which carrier you are using and with whom you are satisfied? Have you looked at
any of the other carriers offering same? how about any other pros or cons between them?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-variant:small-caps;color:#222A35">Everest Broadband - Your Local Voice & Data Network Experts – we’re always nearby<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-variant:small-caps;color:#222A35"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-variant:small-caps;color:#222A35">Paul Stamoulis 1 212 444 3003
<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__t.sidekickopen16.com_e1t_c_5_f18dQhb0S7lC8dDMPbW2n0x6l2B9nMJW7t5XZs5w6vTbVdD-2DFY7dKXNRW8qlRZx56dLX3f4fbXk602-3Ft-3Dhttp-253A-252F-252Fwww.everestbroadband.com-252F-26si-3D5992006913097728-26pi-3D1d0f87e6-2Da797-2D43e8-2Db66d-2D034c045bc663&d=DwMFAg&c=N13-TaG7c-EYAiUNohBk74oLRjUiBTwVm-KSnr4bPSc&r=-GzOCp0ppLaBQPFaZ7lZ4bUUBQxpFBukitRP75oaRdQ&m=izAmTbT9C20gHgUDya0H06r8yOS8p-AXQJ_EmhcYpNo&s=AHhRpyMCK2g4uzsU0ecTvykfvAdUSEYkz4AqUJ6yXR4&e=">
www.EverestBroadband.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-variant:small-caps;color:#222A35"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-variant:small-caps;color:#222A35">for technical support: call 800-918-1900 option 1 email
<a href="mailto:Tickets@EverestBroadband.com">Tickets@EverestBroadband.com</a><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> VoiceOps [<a href="mailto:voiceops-bounces@voiceops.org">mailto:voiceops-bounces@voiceops.org</a>]
<b>On Behalf Of </b>Hiers, David<br>
<b>Sent:</b> Tuesday, October 03, 2017 4:57 PM<br>
<b>To:</b> <a href="mailto:voiceops@voiceops.org">voiceops@voiceops.org</a><br>
<b>Subject:</b> [VoiceOps] SDWAN for VOIP<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal">Is anyone else using SDWAN for VOIP?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We can move a call between links and impose 10% packet loss and the users pretty much don’t notice anything. No loss of call control or mid-call signaling, barely detectable impact on audio quality.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is pretty much the only way we’ve found to deliver the quality that our (very demanding) customers require using a ‘bring your own bandwidth’ model.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It has been such a game-changer for us that I’m being sent to SIPNOC to give a talk about it.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">David<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">
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