* /DTMF dual system call ID auto detect
* Language mail box function
* 50 groups incoming call up to 16 digits, 30 groups outgoing call up to 16 digits
* One group auto-IP and 2 groups hand-IP function
* 5 digits local area code and 2 digits out of range setting
* 7 groups one-touch memory
* Backlight function
* LCD brightness adjustable (5 levels)
* Ring volume adjustable (4 levels)
* Anti-parallel and anti-thunder function