Team:

I have a basic question about adding devices for coverage.  I have a 2474D (the 2-wire installed dimmer switch-RF only) which is not terribly reliable, as there may not be a DUAL BAND device near enough to it.  My question is:  If I choose to plug in a Dual Band dimmer module near it, but not plug a lamp into the module, which I think will enable better communication with my installed 2-wire switch, do I need to add the unused device to my ISY?  Even though there is not a lamp plugged into it - It's only there to provide dual band connectivity to my 2-wire dimmer.  

I know it's a basic question, and I've been using my ISY for a while now, I'm just not so sure how the devices map themselves, and if the powerline modem needs to have the "unused" device (in this case a 2457D2 dimmer module) in a map or table somewhere, to allow the 2-wire dimmer to use it as a node for better communication.

Thanks for any detail - 

Alex

No. Insteon devices will repeat messages automatically. No controller is needed for that to happen

Thank you for the education!  Have a great holiday.  

The 2457D2 would work fine.

The 2992-222 Range Extender is a 2457D2 with the dimmer components not installed.