I know there are several video phones like Purple, CSD (Z340), and Sorenson. The question is here is how I can talk to people to non sorenson device where I have sorenson?
Let assume here, I am using Sorenson VP and I want to call let say to a person who are in USA and have either CSD Z340 or Purple MVP.
I know one method is using the IP number but what about the other method like Local number or what?