1) Connect your grandstream HT801 or HT802 as follows using the cables provided

2) Find the grandstream's allocated IP address from your routers DHCP lease table or by connecting a phone, dialling *** to enter the menu and dialling 02 to hear the IP address.
3) Enter the IP address in your preffered web browser to enter the grandstream admin page. Login with:
Username: admin
Password: admin

4) Once logged in, select FXS Port from the top-right menu.

5) Configure the following settings :

and further down the page:

Once completed, click Update and then Apply to save the settings. Your adaptor will now register to our UK VoIP server.