Re: Circuit Switched Data in the US?

["Miller Grey" <vigilantgregorius () gmail com>]

Interesting...

On Tue, Oct 14, 2008 at 7:25 AM, Fabio Pietrosanti (naif)
<lists () infosecurity ch> wrote:

> Hi all,
>
> i am evaluating how the CSD (Circuit Switched Data) service is available
> in the USA to make mobilephone<-->mobilephone data calls.
>
> This because encrypted mobile phone calls in order to be done without
> intermediate registration servers, required CSD calls (point-to-point
> data path).
>
> I am not considering VoIP, i am talking about CSD calls with
> point-to-point direct data path between phones.
>
> Well, AT&T tell that since end of 2005 CSD is available only for
> "Qualified Government Users" for crypto calls:
>
> http://www.wireless.att.com/businesscenter/solutions/connectivity/circuitswitch.jsp
> A very stupid way of blocking a service used for encrypted phone calls...
>
> I verified that foreign operator's SIM card roaming in the USA can
> receive and make CSD calls. :)
>
> However i am interested in users that in the US can get a local phone
> number from a local operator and then use encrypted phone call system
> over CSD (being it GSM or CDMA don't care, are compatibile networks for
> CSD).
>
> I heard that alltel and verizonwireless even if don't say anything and
> their customer support is not able to tell you anything have working CSD
> support.
>
> Does anyone is interested in making some testing of international data
> calls from europe to the US (i will make the call) to see if CSD service
> it's active on some mobile operator, other than AT&T ?
>
> Or if someone has already experience with USA operator and
> mobile-to-mobile CSD calls it would be an interesting topic!
>
> -naif
>
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