BenQ S700 - Manual (Page 184)

168 Menus
Auto Redial
If there is no answer at a number you have dialed, the phone will
automatically redial.
Auto Redial
If you make a call that is not answered, your phone will
automatically redial up to 10 times before the call is answered.
Prompt Redial
Your phone will ask for your confirmation before it redials.
Off
Disables the Auto Redial feature.