Upgrading via Local Directory .............................................................................................................. 70
Upgrading via Local TFTP/HTTP/HTTPS/FTP/FTPS Servers ............................................................ 70
Firmware and Configuration File Prefix and Postfix ............................................................................ 70
Managing Firmware and Configuration File Download ........................................................................ 71
Configuration File Download ................................................................................................................ 71
RESTORE FACTORY DEFAULT SETTINGS ............................................................... 72
Using the Reset Button ........................................................................................................................ 72
Using the IVR Command ..................................................................................................................... 72
Reset from Web Interface (Reset Type) .............................................................................................. 73
Reset using SIP NOTIFY ..................................................................................................................... 73
EXPERIENCING HT818 ............................................................................................... 74