From one who installed the infinite system for a while, disadvantages of the infinite are:
customer's cannot re-program buttons on phone, this is a central programming task.
Telephones default their button programming easily.
very sensitive to lightning in area.
the voicemail was not integrated with the system it was a secondary market add on.
4 wire telephones (polarity sensitive also)
as far as I know the infinite was manufactured discontinued a few years ago.
Software upgrades (there were many) were EPROM chip replacements.
Not trying to slam the infinite these are just some of the disadvantages that caused my company at the time to drop the infinite from their line.
----------------------------
JerryReeve
Communications Systems Int'l
com-sys.com
Mind like a Steel trap - Once used forever clamped shut.