Strange icon in status bar in IOS5????

I don't have an iPhone but apparently:

If you’ve decided that you’re sick and tired of answering calls on your phone and decided to forward your number to another device then this baby will appear in your phones menubar. It’s pretty handy when you’re going on vacation and don’t want to take your phone with you. Bah. Who am I kidding, the iPhones attached to our hips.​

Source:

http://www.macgasm.net/2009/07/10/iphone-icons/