tmobile wifi voice calls

Thu Jul 17 23:52:12 CEST 2008

Although I'm not yet as knowledgeable about the details as I'll need 
to be, to be able to use my 'moko for this purpose is why I'm here. I 
have tmobile's @Home service and I'm currently using that sim on the 
FR ( the old Nokia 6086 with its BL-5C battery is in standby as an 
emergency battery charger ;-) ).
I'll begin to pursue this via the provided links in my copious spare 
time. Anyone interested in an ongoing dialog let me know.
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
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