Understood but I am not interested in VOIP. I am interested in
implementing phone application functions. Again, based on my limited
understanding, Line2 is not just a VOIP application. It actually
performs phone app functions and can let users pamek calls over the
AT&T network, but I could be wrong.

As far as I know, in Android security/permission barriers prevent any
application from using/implementing phone app functions.

Thank you.

Alex Donnini

On Apr 9, 9:57 am, Disconnect <dc.disconn...@gmail.com> wrote:
> At least google voice isn't VOIP, and ISTR that neither is skype (although
> that may have changed with recent releases.) They both function by dialing
> special-use numbers (google voice uses http to set up a line to remote
> mapping, so that when you call 202-111-2345 gvoice connects you to
> 202-123-4567 and remaps the source #, etc. ISTR the skype app just
> phone-carded it - dial a generic access #, then dial codes to get
> connected..)
>
> Not familiar with sipdroid or fring, and as of 1.5 or so it became possible
> to manipulate the audio stream so they may well be proper sip clients now :)
>
> On Fri, Apr 9, 2010 at 9:45 AM, Mark Murphy <mmur...@commonsware.com> wrote:
> > alexdonnini wrote:
> > > Probably, you have heard of the iPhone application called "Line2". In
> > > short, it gives an iPhone a second phone number and line complete with
> > > contacts list, voice mail, etc., etc.
>
> > It is more generically referred to as "voice over IP" (VOIP).
>
> > > I was wondering if anyone has thoughts as to how the Android security/
> > > permission issues inherent when attempting to develop an application
> > > such as Line2 could be resolved.
>
> > What, specifically, do you feel are "the Android security/permission
> > issues inherent when attempting to develop" a VOIP app?
>
> > I ask because there are several VOIP apps for Android (such as Google
> > Voice, Skype, SipDroid, and Fring, to name four off the top of my head).
> > Hence, it would seem unlikely that there are "Android
> > security/permission issues" in implementing a VOIP app, otherwise those
> > apps would not exist.
>
> > --
> > Mark Murphy (a Commons Guy)
> >http://commonsware.com|http://twitter.com/commonsguy
>
> > Android Consulting:http://commonsware.com/consulting
>
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