Attention at Gigaset Basissationen

Did last week rather long tried in vain to the repeater with a Gigaset SX253 base to mate.
Also all the advice mentioned in this regard the key sequence on the handset (handset) is not fertilized.
I almost wanted to give up, then I have set in the handset menu under Settings basis point repeater found.
When I had chosen this, I had to enter something (can not remember exactly what - but it was self-explanatory) and then I was able to finish the pairing simply for guidance.