This is a short description on how to get your Asterisk machine to work with sipgate.de. A lot of people seem to have some trouble with this. I assume for this document that you have some basic knowledge with Asterisk already or have at least setup your Asterisk server already.
I wanted to have my Asterisk machine to be able to tell me the latest weather in Hamburg, Germany and also tell me a forecast. For this I needed five things:

A while ago, the Plus discounter in Germany wanted to release a washer detergent with the name of Linux. They started distributing this washer detergent in the eastern part of Germany where my box also comes from. A little background and history now: the detergent was called Linux because some swiss company (Rösch AG) got the rights for the name Linux and they planed on putting out a whole product range under the name of Linux.
Well, seems like it didn't work out 'cause the products never really appeared in the Plus shops.
The RBT-3000 (alias BlueGPS) is a Bluetooth GPS receiver from RoyalTek. The specs of the device can be found on their site.