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The Zyxel LTE7490-M904 is an 802.3at PoE powered LTE outdoor (IP68) CPE with integrated directional antennas. Specifications: - SoC: MediaTek MT7621AT - RAM: 256 MB - Flash: 128 MB MB NAND (MX30LF1G18AC) - WiFi: MediaTek MT7603E 802.11b/g/n - Switch: 1 LAN port (1 Gbps) - LTE/3G/2G: Quectel EG18-EA LTE-A Cat. 18 connected by USB3 to SoC - SIM: 1 micro-SIM slots under transparent cover - Buttons: Reset, WLAN under same cover - LEDs: Multicolour green/red/amber under same cover (visible) - Power: 802.3at PoE via LAN port The device is built as an outdoor ethernet to LTE bridge or router. The wifi interface is intended for installation and/or temporary management purposes only. UART Serial: 57600N1, located on populated 5 pin header J5: [o] GND [ ] key - no pin [o] RX [o] TX [o] 3.3V Vcc Remove the SIM/button/LED cover and 12 screws holding the back plate and antenna cover together. Be careful with the cables. Installation from OEM web GUI: - Log in as "admin" on OEM web GUI - Upload OpenWrt initramfs-recovery.bin image on the Maintenance -> Firmware page - Wait for OpenWrt to boot and ssh to root@192.168.1.1 - Sysupgrade to the OpenWrt sysupgrade image and reboot For more details about flashing see: 2449a63208 (ramips: mt7621: Add support for ZyXEL NR7101, 2021-04-19) Main porting work done by Ernesto Castellotti <ernesto@castellotti.net>: bf1c12f68b (ramips: add support for ZyXEL LTE7490-M904, 2023-12-20) Signed-off-by: Eric Schäfer <eric@es86.de> Link: https://github.com/openwrt/openwrt/pull/17485 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>