Does the Insteon system require that you have a PC running at all times, or do you just make changes to the system via the PC?
Vince,
Let me cover some basics for you. To first answer your question, no. Insteon does not need a computer to be on site to operate.
The purpose of a *controller* is to allow you the ability to have timers, conditions, and program ease.
You have several choices at this time: SmartLinc 2412N, this device does not require a computer to be on. As it is a mini web based computer which allows you to control / connect remotely from your cell phone / computer. This is a great device for simple control.
Next is the HouseLinc 2413UH: This device can provide you with timers, and simple conditions, e-mail notification, but requires the computer to be on at all times to execute any timers etc. This device also has a very powerful diagnostic tool to help trouble shoot your network.
Next is the ISY-994 / 99 controller: This is mini computer all by itself and requires no other computer system to be active. It is the most powerful and feature rich of all units listed above. It costs way more, but rest assured you can accomplish endless tasks via the ISY controller.
There is a new Insteon HUB, which is available which is in between the SmartLinc and HouseLinc. This may be the best value / balance between the the three devices.
I have all four units so, but am waiting for the HUB to arrive before I can provide any feed back.
Teken . . .