On 04/20/2012 01:17 PM, Ron Frazier (ALE) wrote: > Aren't most voip calls encrypted by default? I thought that's why MS had to > patent a way to get into the middle of it. > No. SIP traffic is usually **not** encrypted, though it can work through a tunnel. Skype uses a proprietary protocol, not SIP. I believe that is what the patent was about - recording skype calls.