Siemens Gigaset M105

Siemens Gigaset M105 ... both cases. It gives you high-speed transmission without the need to install even more cables. Ideally you should be able to free yourself completely and, for example, with the PC enjoy cordless access to the Internet and at the same time still be reachable by phone. And the best part is that you only need one device for all this. It wouldn't be bad either, even though the ISDN connection is on the ground floor, to have your office on the first floor without having to lay any cables (with all that drilling and hammering).