[Asterisk-Users] Forwarding to regular numbers?

[JD]

I'm trying to set up extensions and have them forward to my cell phone 
or other phones I have and include them in call groups.
I tried *72480204xxxx and *7298480204xxxx,  I get the recording that 
unconditional forwarding is set to that number..
but when I call that extension I just get silence and eventually it 
hangs up.

Someone throw me a clue stick?

JD