said by anony101 :Thanks for the information. I have another question about security. My thought was my cable Internet service is shared with about 60-100 of my neighbors. Wouldn't any of my neighbors on our shared Comcast cable node be able to listen into my VOIP calls?
It depends whether your VOIP provider uses SRTP to encrypt RTP packets from you to their proxy. Some do and some don't. You should call them and ask.
Keep in mind that encrypted VOIP calls lose the encryption once they reach the PSTN.
If you read this thread, you'll see my provider has posted and indicated there is no security for my VOIP content.