<br>Hi David,<br><br>I just performed a test from my Sprint phone in DC to a Herndon rate center Level3 DID. Audio was not delayed. The RTP stream came from a Washington, DC Originated IP on Level3's network as well.<br>
<br>Contact me directly if you'd like me to place any test calls to your numbers.<br><br>Regards,<br>Jared Geiger<br><br><div class="gmail_quote">On Thu, Oct 6, 2011 at 10:13 AM, David Hiers <span dir="ltr"><<a href="mailto:hiersd@gmail.com">hiersd@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Thanks for the feedback!!!<br>
<font color="#888888"><br>
David<br>
</font><div class="im"><br>
<br>
<br>
On Thu, Oct 6, 2011 at 6:54 AM, Jon Schnelz <<a href="mailto:jschnelz@enterprisepcs.com">jschnelz@enterprisepcs.com</a>> wrote:<br>
> Hey David have you tested the following scenarios:<br>
><br>
> 1) Out of area Cell phone roams into the affected market(s)<br>
> 2) Assigning a Wash DC DID to a phone in your PDX market and testing with a<br>
> PDX cell phone.<br>
><br>
> In the first case the out of area phone will use a TLDN that is typically a<br>
> non-cellular DID (it is typically part of the wireline network for the<br>
> wireless carrier).<br>
><br>
> The second scenario should remove the local market handoff between the cell<br>
> carriers and level3. You might also try a Wash DC assigned cell phone used<br>
> in PDX to the Wash DC DID.<br>
><br>
> We had a similar problem with Nextel phones to Level3 DID's which turned out<br>
> to be a SIP trunk issue between Sprint and Level3 (it was on Sprint's side).<br>
> We had to get Level3 to open a ticket with Sprint for testing. Since this is<br>
> all carriers, it points to a Level3 issue (if they are L3 DID's on your VOIP<br>
> phones)<br>
><br>
> Jon Schnelz<br>
><br>
</div><div><div></div><div class="h5">> Message: 4<br>
> Date: Thu, 6 Oct 2011 06:30:32 -0700<br>
> From: David Hiers <<a href="mailto:hiersd@gmail.com">hiersd@gmail.com</a>><br>
> To: <a href="mailto:VoiceOps@voiceops.org">VoiceOps@voiceops.org</a><br>
> Subject: [VoiceOps] Audio latency in DC area, Part 2<br>
> Message-ID:<br>
> <<a href="mailto:CANpkwCZ2ZxzLVmN4aOhW2pr4Rf403KpHoKxtB7KgUD3_gvVadg@mail.gmail.com">CANpkwCZ2ZxzLVmN4aOhW2pr4Rf403KpHoKxtB7KgUD3_gvVadg@mail.gmail.com</a>><br>
> Content-Type: text/plain; charset=ISO-8859-1<br>
><br>
> Hi folks,<br>
><br>
> I want to send out another shout regarding an on-going issue in the DC area.<br>
> We've got excessive audio delay between our voip phones and cell phones.<br>
> Packet specs (loss, jitter, etc) are fine, ping times for everything rock.<br>
><br>
> Specifically, these rate centers are involved:<br>
><br>
> DALE CITY<br>
> HERNDON<br>
> MANASSAS<br>
> WSNGTNZN08<br>
> WSNGTNZN17<br>
><br>
> but NOT this nearby one:<br>
><br>
> TRIANGLE<br>
><br>
> Here are some of the voip NPA/NXXs involved:<br>
><br>
> 703647<br>
> 703880<br>
> 703508<br>
> 703647<br>
> 240283<br>
><br>
> The issue affects any cell in the area. All our test calls are local; the<br>
> cell phone is in the same building as the voip phone.<br>
> The cell phone has and has strong signal.<br>
><br>
> We've measured audio latency of up to 550ms; it is just impossible to hold a<br>
> conversation.<br>
><br>
><br>
> In all cases:<br>
><br>
> 1. VOIP-to-CELL calls are slower than CELL-to-VOIP 2. 3G is slower than GSM<br>
> 3. PSTN-VOIP calls are good 4. PSTN-CELL calls are good<br>
> 5 Only VOIP-CELL calls are bad<br>
><br>
> Anyone got any issues in the DC area? Would your users report this kind of<br>
> problem? The DC area comes in near the bottom of the list on most of the<br>
> "bad cell phone area" studies, so most cell users there have had tolerance<br>
> of this sort of thing beat into them over the years.<br>
><br>
><br>
> Thanks,<br>
><br>
> David<br>
><br>
><br>
> ------------------------------<br>
<br>
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</div></div></blockquote></div><br>