As an update, a couple hiccups along the way, but it does seem the pulsing type issues are gone now that I am connected directly to my DECT, and not to the house wiring.

I'm not 100% sure of this yet -- time will tell.

If this is the case, the only real discovery is it seems the Grandstream device is more sensitive to attached wiring than the Linksys device I used to have.

Mike