[VoiceOps] Audio latency in DC area, Part 2

[Jared Geiger]

Hi David,

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.

Contact me directly if you'd like me to place any test calls to your
numbers.

Regards,
Jared Geiger

On Thu, Oct 6, 2011 at 10:13 AM, David Hiers <hiersd at gmail.com> wrote:

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