Adtran SDG-8622 OpenWrt Firmware

Name: Adtran SDG-8622
Brand: Adtran

The Adtran SDG-8622 is supported by OpenWrt on the mediatek/filogic target. 2 firmware images are available from the official OpenWrt 25.12.5 stable release — download one below, or build a custom OpenWrt image for this device with your own package selection.

Build matrix

Supported firmware versions

Distribution	Version	Target	Profile
OpenWrt	25.12.5	mediatek/filogic	smartrg_sdg-8622

Downloads

Download images

OpenWrt 25.12.5 · mediatek/filogic

Image	Type	sha256
openwrt-25.12.5-mediatek-filogic-smartrg_sdg-8622-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery.	kernel	1b71c63465f5…
openwrt-25.12.5-mediatek-filogic-smartrg_sdg-8622-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt.	sysupgrade	e383c27f637f…

Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.

Packages & install

Default packages & installation

Default packages

Every image for the Adtran SDG-8622 ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.

Device packages (8)

e2fsprogs f2fsck mkf2fs kmod-hwmon-pwmfan kmod-mt7915e kmod-mt7915-firmware kmod-mt7986-firmware mt7986-wo-firmware

Target default packages (30)

apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fitblk fstools kmod-crypto-hw-safexcel kmod-gpio-button-hotplug kmod-leds-gpio kmod-nft-offload libc libgcc libustream-mbedtls logd mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail uboot-envtools uci uclient-fetch urandom-seed urngd wpad-basic-mbedtls

Installation notes

Already running OpenWrt or ImmortalWrt: flash the sysupgrade image from LuCI (System → Backup / Flash Firmware) or with the sysupgrade command.
The kernel / initramfs image boots from RAM without writing to flash — useful for a first install or for recovering from a failed flash.

Verify your download against the published checksum before flashing:

$ sha256sum openwrt-25.12.5-mediatek-filogic-smartrg_sdg-8622-initramfs-kernel.bin
1b71c63465f52d2b67103e4f0df0640c19782356c64e5544b434bc3033a76df5  openwrt-25.12.5-mediatek-filogic-smartrg_sdg-8622-initramfs-kernel.bin

Build custom firmware

Need more than the default image for the Adtran SDG-8622? Pick your packages — LuCI apps, themes, VPN clients — set the basics, and get a ready-to-flash OpenWrt image assembled from official packages in minutes.

Customize firmware for this device

More Adtran devices

More devices on mediatek/filogic

Upstream

Upstream & source

Images are assembled from packages compiled and published by the upstream OpenWrt and ImmortalWrt projects. The complete corresponding source code is available from those projects under the GPL.