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Does anyone have idea how to set up 3g Dognle to work on this router?
With OpenWrt or something?

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Dani AI

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Good starter tip from pointing at the OpenWrt 3G-dongle documentation. The practical checklist below fills in the typical real-world steps and gotchas needed to make a USB modem work on a home router such as the Siemens Gigaset SX763 when running OpenWrt (or to diagnose why it won’t).

First checks and quick commands to run on the router (SSH or LuCI shell):

ssh root@192.168.1.1
cat /etc/openwrt_release
lsusb
dmesg | tail -n 50

What to look for and next steps

  • Confirm the SX763 actually has a powered USB host port and that OpenWrt is installed. If OpenWrt is not available for that model, built-in firmware probably won’t support generic 3G dongles.
  • Plug the modem and watch dmesg/lsusb. If the device appears as /dev/ttyUSB* it’s a PPP-type modem; if it shows cdc_ether, rndis or /dev/cdc-wdm0 it may be CDC-Ether/MBIM/QMI (newer modems).
  • Typical packages/utilities to install on OpenWrt (select by modem type): USB mode switching (usb-modeswitch), the right kernel modules (option driver for many Huawei/ZTE, cdc_ether/qmi_wwan for others), PPP tools for tty-based modems, or libqmi/uqmi or libmbim for QMI/MBIM devices. Use LuCI Network → Interfaces to create a 3G/WWAN interface or configure it via UCI.

Common problems and tips

  • Many dongles draw more current than the router USB can supply — use a powered USB hub.
  • Some modems present themselves as a mass-storage device initially; usb-modeswitch is required.
  • SIM lock, wrong APN, or missing kernel support will prevent connection. If the kernel lacks the needed kmod, the modem won’t enumerate correctly.
  • If the SX763’s OpenWrt build is old, update to a newer build with modem support or use a dedicated 3G travel router or phone hotspot as a fallback.

Providing the modem vendor:product id (from lsusb) and the last 40 lines of dmesg is what typically lets helpers identify the exact kernel modules and opkg packages needed.

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Member Avatar for Member #921280

Thanks I will try it

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