I contacted snom to inquire about the v1.17 release which is rumored to have the uploadable contact list feature that I seek. They tell me that it is presently in beta, and offered directions on where to point my phone to load the beta version. I think I’ll try this next later in the week when I’m back in my office.
If that feature proves out usable then I’ll be ordering one of their DECT range extenders to fill in some coverage gaps in the forward portion of the house, and perhaps finally decomissioning the ages old Panasonic KX-TG4000 KSU.