> > It's more effective to spend the money on SMS messages. Mobile > > providers are forced to use very aggressive anti spam measures, which > > can add significant delays in message delivery. > > Recommendations on software and modems? Easy enough to build, here's one I made earlier http://www.bogons.net/pics/x1gsm.jpg ebay/old Sun X1, serial gsm modem, qpage = OOB alarms Sun X1s are cheap, low power and have good management already so you can throw them in remote places brandon
