What is you DHCP lease length? Can you have something that that checks the
for the mac address of the phone in the DHCP leases and if it is there, do
the needful on VOIP box, otherwise don't forward calls to your cell phone?
If the lease is short enough, that could work.

Kent

On Tue, Mar 31, 2015 at 12:17 PM, Tilghman Lesher <tilgh...@meg.abyt.es>
wrote:

> I suspect the Google Docs/Dropbox is simply manipulating various URLs
> via some RESTful API.  If you can instead load an arbitrary URL, I'd
> suggest one that hooks into a CGI script running on your Asterisk
> server (or another local web server) that simply sets a value in a
> database row.  Your PBX can then reference that database row using my
> func_odbc module (built-in to Asterisk since the 1.4 days).
>
> On Tue, Mar 31, 2015 at 12:05 PM, Chris McQuistion
> <cmcquist...@watkins.edu> wrote:
> > Some good ideas here (multiple sensors (maybe low-power bluetooth) to
> detect
> > incoming path vs outgoing path) and some not-so-good-ideas (implanting
> > sensors inside of my body....)
> >
> > iOS (and I assume Android as well) have low power background app refresh
> (at
> > least this is what Apple calls it) that you can use for geo-location.  It
> > isn't actually using GPS, as that would chew up battery power.  It is a
> > background process that uses info from WiFi networks, cell towers, etc,
> to
> > determine location "passively", so it doesn't chew up a lot of battery
> > power.
> >
> > What I got working yesterday was two IFTTT "recipes" to create files in
> > Google Docs and Dropbox for each time I enter or exit the Watkins area.
> > That part actually works.  The next step is doing something with that
> > information (from Google Drive or Dropbox) to launch an action on our
> VoIP
> > server.
> >
> > It still seems kludge-y to me, but I haven't heard a better suggestion
> that
> > less power (and is fully automated.)
> >
> > Chris
> >
> > On Tue, Mar 31, 2015 at 6:02 AM, JMJ <roadr...@gmail.com> wrote:
> >>
> >> On 03/31/2015 12:54 AM, Tilghman Lesher wrote:
> >>>
> >>> That's also why I suggested that you place two proximity detectors
> >>> along a single path.  The order in which they activate then indicates
> >>> ingress or egress.
> >>
> >>
> >> And since nobody has mentioned using a Raspberry Pi yet... you could
> make
> >> a proximity detector out of a Raspberry Pi with a camera and/or a USB
> >> Bluetooth gadget.
> >>
> >> If the work schedule is consistent, you could just schedule the PBX to
> >> route calls based on the time of day.  Yeah, I know... who has a
> consistent
> >> work schedule any more?  heh heh
> >>
> >> JMJ
> >>
> >>
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