Is it possible to deploy an iControl system without networking? For example, if I only have one sensor that needs to report in?
Yes. You may utilize an iControl system comprised of a single iTAG configured with Wide Area Network (WAN) capability for communications (thus performing the gateway function of an iGATE). However, in the event that you have multiple sensors within a relatively close geographical area, it may make more sense to share resources (share one cell or satellite service, to communicate data from multiple sensors on a wireless network). In the long run, this may be a more cost effective solution.