Denwa Communications DW-310P User Manual page 64

Field name explanation
Do Not Select DND, the phone will reject any incoming call, the
Disturb callers will be reminded by busy, but any outgoing call from
the phone will work well.
Ban If you select Ban Outgoing to enable it, and you cannot dial
Outgoing out any number.
Enable Call Enable Call Transfer by selecting it.
Transfer
Semi-Attend Enable Semi-Attended Transfer by selecting it.
ed Transfer
Enable Auto Enable Auto Redial by selecting it, then the phone reminds
FEATURE