Making calls to mobile or land line phones from windows live messenger beta?

I have windows live messenger beta. How can I make calls to land or mobile numbers (NOT to PC's)?

Making calls to mobile or land line phones from windows live messenger beta?microsoft downloads

Don't use that, use Skype. www.skype.com

Making calls to mobile or land line phones from windows live messenger beta?microsoft word 2003 internet explorer

cannot make
use the following instead

skype(www.skype.com)

or use simply yahoo messenger
You can't make call from yahoo messenger beta to landline or mobile.