nbn setup guides for popular non-iiNet modems are available here.
If your third-party modem still isn't online after you've plugged it in, you may need to configure additional settings listed in this article. Please check the manufacturer…
This article will link you to setup videos for iiNet modems, which will show you how to plug in your iiNet modem for different types of nbn.
To get started, select your nbn® service: