Here is a brief guide of the manual registration if you have any bugs:
1. Insert Repeater for 1-5s in the socket and then remove
2. Insert the Repeater into the socket and leave it - the LED blinks
3. the "Paging" button on the base unit for a few seconds (IMPORTANT Do not press too short) and hold - The LED on the repeater flashes quickly without interruptions
4. Press On Mobiltteil the green handset 2-3 seconds and dial a number 2-7 as a repeater number. The LED on the repeater flashes as many times as the assigned number.
5. press the * key on Mobiltteil and then again hold down the green call button - LED on the repeater goes out briefly and then lights permanently.
6. The installation is completed and the repeater can now be disconnected from the power and are plugged at its destination again. The registration with the base station remains!
The only "night part" was the English manual and the automatic registration failed.
That's why there's 4 stars.