[VoiceOps] Cell Phone to SIP provider

[Carlos Alvarez]

You seem to be suggesting that there is a technical reason the carriers
don't do this.  There is not.  Carriers prioritize voice channels, which
really are just data also, though not using SIP.  They *could* choose to
prioritize data, or do the usual QoS for the data so VoIP has good quality,
just like any other IP connection.  They won't, because it's a huge threat
to their business model.


On Tue, Sep 13, 2011 at 9:07 PM, Paul Timmins <paul at timmins.net> wrote:

> My android phones do SIP user interface integration over HSDPA and EVDO
> respectively, and frankly, the voice quality isn't that great. Much worse
> than the underlying GSM or CDMA signal bar for signal bar.
>
> There's a reason the carriers aren't doing this yet.
> -Paul
>
> On Sep 13, 2011, at 11:32 PM, Scott Berkman wrote:
>
> You might want to see if LightSquared has anything for you, they dub
> themselves the “only wholesale-only mobile carrier”, but I’m not sure what
> they can offer today.****
> ** **
> http://www.lightsquared.com/****
> ** **
> Also, aren’t some of the newer cellular technologies (UMTS or EVDO)
> inherently built on SIP for the voice portion of the network?  That’s not an
> answer to your problem, but…****
> ** **
> One other thing you might want to look into is an OS that allows the
> default phone app to use SIP over the data connection natively (as opposed
> to using a separate soft phone application that might not integrate as well
> to the UI).  I believe this was preset in versions of WM6, but that’s
> somewhat old now and I have no idea if it’s built into any other platforms.
> ****
> ** **
>
> http://voipguides.blogspot.com/2008/05/voip-sip-client-for-windows-mobile-6.html
> ****
> ** **
> -Scott****
> ** **
> *From:* voiceops-bounces at voiceops.org [mailto:
> voiceops-bounces at voiceops.org] *On Behalf Of *Carlos Alvarez
> *Sent:* Tuesday, September 13, 2011 3:44 PM
> *To:* VoiceOps at voiceops.org
> *Subject:* Re: [VoiceOps] Cell Phone to SIP provider****
> ** **
> It is my understanding that:****
> ** **
> a.  The original post asked about sending the calls to the end point (cell
> phone) as SIP, not cellular voice.****
> ** **
> b.  Sprint's MIS (Mobile Integration Service) merely allows a company or
> service provider to connect to them directly over TDM or SIP and do seamless
> integration of the cell and other phones, but the call is still cellular
> voice to the handset.****
> ** **
> I am facing a competitive sale right now to a municipality where there is
> only one other carrier who can compete with us, and only on that one
> feature.****
>
> ** **
> On Tue, Sep 13, 2011 at 12:33 PM, Matthew S. Crocker <
> matthew at corp.crocker.com> wrote:****
>
> Sprint does this.   The cell phones register to the cell tower as cell
> phones.  The cell tower converts to SIP and registers with the call agent.
> Broadsoft mentioned something about this at the last connections
> conference.  You would get a private IP connection into Sprint to carry the
> voice traffic.    This would be perfect for me if Sprint had a decent cell
> network in my area.   Does anyone know if AT&T or Verizon (LTE) do it as
> well?
>
> http://newsroom.sprint.com/article_display.cfm?article_id=1628
>
> ****
> ------------------------------
>
> *From: *"Oren Yehezkely" <orenyny at gmail.com>
> *To: *"VoiceOps at voiceops.org" <voiceops at voiceops.org>
> *Sent: *Tuesday, September 13, 2011 1:00:02 PM
> *Subject: *[VoiceOps] Cell Phone to SIP provider****
>
>
>
> Hello,
>
> I am looking for a cell phone company that is capable of providing SIP
> service instead of sending the calls over the cellular network.
>
> If anybody here is capable of providing such a service or can recommend a
> vendor that can do that, please let me know.
>
> Thanks,
>
> Oren****
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> ** **
>
>
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> ****
> ** **
> --****
> Carlos Alvarez****
> TelEvolve****
> 602-889-3003****
> ** **
> ** **
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>
>


-- 
Carlos Alvarez
TelEvolve
602-889-3003
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