All:
> Dumb questions about the 5.8Ghz cordless phone systems standards:
> * Is a handset from one vendors system automatically compatible with
> that from another vendor, or are they all vendor specific.
> * Is there a limit to the number of additional handsets that can be
> added to a base station, or is this vendor specific.
Both are vendor specific. 5.8GHz is simply a different frequency, nothing else changes from 2.4GHz or the 900MHz phones of ages past.