How to install TP-Link wireless router to work with a DSL Modem (PPPoE)
Amazon.com: TP-Link N300 Wireless Extender, Wi-Fi Router (TL-WR841N) - 2 x 5dBi High Power Antennas, Supports Access Point, WISP, Up to 300Mbps : Electronics
User manual TP-Link TL-WR340GD (English - 86 pages)