? Tudor Seicarescu Saving money for business worldwide Tel. Montreal: 1-514-400-2575 Tel. Romania: 40-21-589-7246 Cell Romania: 40-762-863-429 Yahoo: apaminerala Skype: apaminerala http://ca.linkedin.com/in/apaminerala ________________________________ From: "voiceops-request at voiceops.org" <voiceops-request at voiceops.org> To: voiceops at voiceops.org Sent: Wednesday, September 14, 2011 8:22 AM Subject: VoiceOps Digest, Vol 27, Issue 10 Send VoiceOps mailing list submissions to ??? voiceops at voiceops.org To subscribe or unsubscribe via the World Wide Web, visit ??? https://puck.nether.net/mailman/listinfo/voiceops or, via email, send a message with subject or body 'help' to ??? voiceops-request at voiceops.org You can reach the person managing the list at ??? voiceops-owner at voiceops.org When replying, please edit your Subject line so it is more specific than "Re: Contents of VoiceOps digest..." Today's Topics: ? 1. Re: Cell Phone to SIP provider (Matthew S. Crocker) ? 2. Re: Cell Phone to SIP provider (Carlos Alvarez) ---------------------------------------------------------------------- Message: 1 Date: Wed, 14 Sep 2011 07:24:32 -0400 (EDT) From: "Matthew S. Crocker" <matthew at corp.crocker.com> To: Paul Timmins <paul at timmins.net> Cc: "VoiceOps at voiceops.org" <voiceops at voiceops.org> Subject: Re: [VoiceOps] Cell Phone to SIP provider Message-ID: <a2e95fd1-297b-44d5-a9d3-9f6ad2644f34 at zimbra1.crocker.com> Content-Type: text/plain; charset="utf-8" Of course there is no reason why SIP couldn't be used for signaling and just establish the voice over a GSM / CDMA codec. The cell tower could transcode to RTP. Getting SIP direct to the handset would be good . The cell towers would just need to act like a SIP proxy ----- Original Message -----
From: "Paul Timmins" <paul at timmins.net> To: "Scott Berkman" <scott at sberkman.net> Cc: "VoiceOps at voiceops.org" <voiceops at voiceops.org> Sent: Wednesday, September 14, 2011 12:07:14 AM Subject: Re: [VoiceOps] Cell Phone to SIP provider
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.
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....
-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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Carlos Alvarez
TelEvolve
602-889-3003
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