There has been a lot of hype surrounding the use of wireless GPRS networks for the purpose of monitoring alarm systems. Unfortunately, time has proven that the networks are not stable enough for us to rely on them for continuous supervision of the transmission path.
Some GPRS solution providers have added a second SIM to their product, but if you have to use a GPRS network, the most sensible approach is to use GPRS only as a backup to fixed wire IP networks.
