Re: Circuit Switched Data in the US?

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

What kind of tests?

On Wed, Oct 15, 2008 at 3:37 AM, Fabio Pietrosanti (naif)
<lists () infosecurity ch> wrote:

> Hi,
>
> interested in making some tests and evaluating some possible issue?
>
> Fabio
>
>
> Miller Grey wrote:
>
> > 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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