Welltech LP-388 Release 103 - Manual (Page 68)

LP388 User’s Manual 67
(3) Digit Manipulation
add: Add a rule to drop or insert prefix digits of incoming call.
prefix: Set which prefix number to implement digit
manipulation rule.
drop: Enable or disable drop function. If this function is
enabled, Phone will drop prefix number on incoming call.
insert: Set which digit to insert.
delete: Delete a digit manipulation rule by index.