Hard Reset Grandstream HT802 Phone Adapter

How to troubleshoot or setup starting with a hard reset a Grandstream HT802 2 Port Analog Telephone Adapter to factory default settings if it is not working or not connecting or if it is frozen or not responding, the factory reset is a good troubleshooting step. You can also restore the factory settings to setup your device as new. Found in the Grandstream HT802 2 Port Analog Telephone Adapter user manual.