Asterisk and sipgate.de

Hi,
I am new to asterisk and have install a 1.8.10 to my local server.

I would like to get it working from skratch (in general it already starts and the basic configuration is available through the package installation on ubuntu 14.04).

Is there a guide how to configure context, extension and register… for sipgate.de?

Thanks in advance
Kallewirsch