Zyxel PLA401 v2 Guide De Démarrage Rapide page 6

you need to, but the powerline devices need to be plugged
into power outlets.
2 Press the ENCRYPT button at the rear of both of your
devices for 10~15 seconds. This sets up a random
network name.
3 Press the ENCRYPT buttons at the rear of your powerline
devices for 1~2 seconds.
A
B
PRESS
2 SEC.
ENGLISH
PRESS
10~15 SEC.
WITHIN
120 SEC.
6
C
PRESS
2 SEC.