tmobile wifi voice calls

[c d r]

> I'll begin to pursue this via the provided links in my copious spare  
> time. Anyone interested in an ongoing dialog let me know.

how well integrated is it?

i was planning on using a moko, primarily via SIP/IAX but with T-Mo prepaid SIM for occasional GSM needs

if it can seamlessly roll between the two, preferring wifi/sip (or their equiv) when available, that would kick ass


> 
> Chris
> 
> 
> 
> On Jul 17, 2008, at 2:32 PM, Al Johnson wrote:
> 
> > On Thursday 17 July 2008, Carl Karsten wrote:
> >> "Make and receive unlimited nationwide calls over Wi-Fi with your  
> >> home
> >> phone."
> >> http://www.t-mobile.com/shop/plans/cell-phone-plans-detail.aspx?tp=tb1&rate
> >> plan=T-Mobile- at Home
> >>
> >> Anyone know if the FR will work with whatever VoIP protocol t- 
> >> mobile uses?
> >> does anyone even know what protocol it uses?   I found this:
> >>
> >> "The technology T-Mobile is using is called Unlicensed Mobile  
> >> Access, or
> >> UMA. UMA takes the protocol used by GSM handsets and encapsulates  
> >> it into
> >> an IPSec VPN for transmission over the public Internet. The VPN is
> >> authenticated using the subscriber's SIM card via a protocol called
> >> EAP-SIM."
> >> http://www.voip-weblog.com/50226711/is_the_linksys_wrtu54g_voip.php
> >
> > Nice prompt for a little background reading. From what I see it seems
> > unlikely. strongSWAN appears to support IKEv2 and EAP-SIM but  
> > somehow I doubt
> > T-Mobile will hand out the certificate needed in addition to the  
> > SIM. The bit
> > that looks tricky is the signalling part to tell the mobile phone  
> > network
> > that it can pass the call data over to the wifi connection. This is  
> > the sort
> > of thing that's normally buried in the cellular modem, and I don't  
> > know of an
> > open version of that. I could be pleasantly surprised though - it  
> > would be a
> > good addition to have.
> >
> > [1] http://www.embedded.com/underthehood/205916513
> > [2] http://www.linuxdevices.com/news/NS6470081317.html
> >
> > _______________________________________________
> > Openmoko community mailing list
> > community at lists.openmoko.org
> > http://lists.openmoko.org/mailman/listinfo/community
> 
> 
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