Grandstream HT812 Setup Guide

Last Updated: Thursday 11 Dec 2025

Here’s a helpful setup guide for the Grandstream HT812.

Step 1 – Check list

• Grandstream HT812

• Power adapter (comes with the Grandstream HT812)

• Ethernet cable (comes with the Grandstream HT812)

• Analog phone

• Modem/router

Step 2

Insert one end of the Ethernet cable into the WAN port in the back of the Grandstream HT812. The symbol will look like a globe.

Connect the other end of the Ethernet cable into a LAN port in your modem/router.

Step 3

Insert a standard telephone cable into the line 1 phone port at the back of the Grandstream HT812. The symbol will look like a telephone and have either a number 1 or 2 next to it. By default, we configure line 1, so it’s best to put the telephone cable into line 1.

Plug the other end of the telephone cable into your analog phone.

Step 4

Get the power adapter and insert it into the back of the Grandstream HT812, the symbol for the power adapter port will look like a power on/off symbol.

Plug the other end into a wall outlet.

Step 5

To configure your Grandstream's settings, please refer to our VoIP settings page and your Grandstream's user guide.

Configuring a Grandstream could be more complicated than some other devices like routers.

If you'd like a hand, our support team is happy to help. Feel free to get in touch via LiveChat or by calling 1300 880 905.