[ale] [OT] Building a home 'landline' using the cellular network

[Jason Jessico]

A digium card will get you the interface you need from the IP PBX to
the existing multi party copper wiring in the house.  If the cellular
gateway also has a copper handoff, a multiport digium card can act as
the PBXs interface to the provider side as well.  The Asterisks (or
other) configuration for this should be trivia.  Regarding emergency
services, provided the SMS card and telephone number you are using
provides the correct location information to the cellular carrier,
your calls should be routed the correct PSAP with no configuration or
intervention on your side needed.

On Sun, Jan 5, 2020 at 6:59 PM Stephen R. Blevins via Ale <ale at ale.org> wrote:
>
> On a non-technical level, give some consideration to making sure your
> system will interface with E-911 correctly.  In a moment of "panic" one
> of your users may try to use this system to get emergency help.  Also,
> what are your expectations for the system if the power goes our.
> Typically, the POTS system works when the power is out.  Just a thought.
>  YMMV
>
> Stephen R. Blevins
> stephen.r.blevins at gmail.com
>
> On 1/5/20 4:03 PM, Robert Tweedy via Ale wrote:
> > Hi Ale,
> >
> > I'm entertaining an idea (currently months/years out on implementation, should it turn out to be feasible) of trying to build a simple in-home phone system that would run over a cellular network (specifically one of the GSM networks like AT&T or T-Mobile, so that I could simply swap out the SIM card should I ever want to change providers), and I was wondering if anyone else here has tried to do this and could offer any pointers.
> >
> >>From what I've looked at so far, it looks like I'd need a GSM gateway or similar device to ultimately make the connection to the cellular network, along with a Linux system running something like Asterisk or FusionPBX and the associated cards/hardware to interface with the POTS wiring inside the house (just looking for a simple party-line style setup at the moment; no need to handle multiple extensions/numbers and no desire to buy expensive VoIP/business-class phones). Any suggestions on where to start with something like this, or any pitfalls that you may have experienced when setting up something like this yourself?
> >
> > Thanks,
> > Robert
> >
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