TP-Link Archer A9 Guide D'installation Rapide page 8

English
Connect the Hardware
If your Internet connection is through an Ethernet cable from the wall instead of through a DSL/
Cable/Satellite modem, connect the Ethernet cable directly to the router's Internet port, and
skip Step 2,3,5 to complete the hardware connection.
Power adapter
Modem
5
INTERNET
Power adapter
2
5
3
1
4
Router