What are the major differences between TIMS and FRS, other than offshore processing ?
FRS is a remotely hosted online solution, so anyone can access it from anywhere, (with the right password). This is a big advantage because it means duty officers (or even CRD) can check the system from anywhere. Of course, it also means there are more points of failure, as it relies on multiple networks to operate. The RFS system also allows for rostering (I believe) and the ability to call in and mark yourself as unavailable (so a duty officer can easily see who's in area).
The TIM system on the other hand is fully based at the local fire station. It attaches to a scanner or fire station interface to identify local responses and display them. It cannot be accessed from outside, and is dependent on a single computer. The ability to call in as responding is done by using caller ID on a phone line attached to a modem on that computer, so the system is essentially free.
The two are coming from different directions though, and fullfill different roles - the FRS is directed towards personnel management (who is available and who is responding) and TIMS is more about turnout management (what you're responding to and where it is).