There are many different codes and functions you can do on a phone connected to a Grandstream HT801/2 Adapter, all with their own purpose. This FAQ details exactly what they are, how to select that option, and what it does.
Grab the phone connected to the adaptor and then dial ‘***’ and will be brought to the main menu, in which you are asked “Enter a Menu Option”.
Enter one of the numbers below to get to the option, press ‘*' to go to the next option, and '#’ to return to the main menu.




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