It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
MobiGater is a device which transfers your Skype calls to your mobile phone without the use of SkypeOut credits. It connects to your cell phone via a SIM card placed inside it, and using a USB cable to your PC and Skype.