Michel --
I will try to provide answers to the rest of your questions tonight when I get home, but in the meantime:
1. I did not import the existing links (as far as I know). This is a new install--I may have created some links in devices when I was playing around, but I am not trying to preserve those when I add a device to the ISY.
2. I just did a individual restore against the device that was not responding to the ALL OFF / ALL ON.
3. For the devices that are not responding, none of these belong to a scene (I only have two scenes defined so far, and the devices that are included in it respond fine to the ALL OFF/ALL ON.)
Now, when I get home and do more experimenting/troubleshooting, you mention that the device needs to have a "slave link" for the PLM. How is that created? Lately, all I am doing when adding devices is activating the "Start Linking" item in the Link Management pulldown, then going to the device and pressing in the set button (pushing the air gap button in) for about 3 seconds until the light blinks twice (for switchlinc dimmers). I think for the first few devices I added, I did it differently--I pressed the top of the paddle for 10 seconds. I think these ones where I used the top paddle press for 10 seconds are the same ones that are responding to the ALL ON / ALL OFF command from the ISY. Is that just coincidence?? Is there any difference in these two methods of adding? Perhaps I need to brush up on my Switchlinc Insteon manual...
Thanks for helping me through the forest.
Regards,
Dave