The Sorenson VP-100 videophone only requires high speed internet access. A phone line maxes out at 56Kbps and will not be fast enough to transmit video. DSL, Internet Cable, or other faster internet access is perfectly acceptable.
Did you get this free from Sorenson? Do they allow you to use it to connect to other deaf people or only to relay services?
I have several friends who like it because it's free, but aren't very happy with the service:
1) Limited to only Sorenson's service and hours (very limited hours, especially on Sunday and holidays)
2) Not having the option to use any of the other relay services (AT&T, Sprint, Hamilton) that do have longer hours or better service
3) Required to use the phone 30 minutes a month for relay service, or else it's not free.
If you want to be able to get a free webcam without those limitations, you can contact any of the above relay services, they'd be happy to help you out.