[asterisk-users] Re: Home Hardware SIP Proxy with use of POTS in Emergency

[Martin Joseph]

On 2006-10-09 15:53:36 -0700, "Brandon Galbraith" 
<brandon.galbraith at gmail.com> said:

> 
> 
> Does anyone know of any ATA devices (Linksys, Dlink, Cisco, etc) that will
> fail over to POTS for an emergency call? I'd like to route any call except a
> 911 call over SIP or IAX, but any 911 call should be routed out over POTS.
> If this is not an option, I'm also open to devices that will fail over to
> GSM to make the emergency call. I apologize if this topic has already been
> covered before.
> -brandon

The AG168V, which has actually become a  pretty nice ATA at this point 
(thanks to continued firmware updates), can do this for sure.  Not only 
will it fail over nicely if there is a power off,  but it also has a 
built in function that can trap particular calls (ie 911) and send them 
over PSTN.