My Dlink DVC 1000 is mainly a old model (2003) and it is new, never opened so I used it. Chevy57 can call me with a phone number (can't say which) and it connected to my dlink fine. It doesn't have a customised firmware, it has the latest, I believe is outdated but still works, only that I can not dial phone numbers to other videophones, due to the firemware system, VP 200 can dial phone numbers, mine doesn't. But can call directly to me by phone numbers, it works - either way, IP address works too. I can only dial IP address to call a friend anywhere.