Use the arrow button to navigate to Factory Reset. The MAC address will be found on the backside of the phone. Enter the MAC address by using for numbers. For the letter A press 22 Pressing the 2 key twice will result in A showing in the box Grandstream GXP2110 IP Phone the screen. If the MAC has digits like 22, you will need to type 2 then press the right arrow key to move the cursor or wait for[…]
