All! Just a question if anyone can help: I live in Asia,

Hi All!
Just a question if anyone can help:
I live in Asia, and have normal DSL. I am getting a client issued VOIP phone, and want to hide my IP from any users so they basically see my IP as U.S.
Just for security.
Will a normal proxy (I'm going to buy some, I think) hide my IP router address to anyone including the VOIP provider?

Mark