I have a neighbor who tried to have it installed. he had to call me over as his computer stopped functioning at all. I found that it had been completely disconnected.
he told me the guy from vonage had been there trying to install the phone for him.
Rather than go into details, what happened was the installer was unable to get the phone to work for him. he also managed to unhook or unplug everything near where the phone was supposed to be placed.
He also managed to actually cut the burglar alarm system wires knocking that out!
I forget the reason now but I told my friend that the vonage system was completely incompatible with his house and computer systems.
Eventually vonage took back the phone and refunded him.
Nothing was offered to repair the extensive damage to his alarm system, computer and printer!
Lucky for my neighbor that I repair and maintain computers. took most of a saturday to get him up and running and rewire his alarm system and his telephones.
Oh, I remember that he wanted a dedicated line for his printer. That created the havoc!