Modem icon in menu bar

I installed the software for a 3G dongle. It added a modem icon in the menu bar (see attached image).

This icon is present all the time, even when the dongle is not connected.

Anyone know how to hide this icon so that it only shows when the dongle is connected?

 

Clicking just brings up the sub-menu (as attached) - and network preferences offers no option to remove it as far as I can see.

Option clicking does nothing.