From

Allows you to select a condition applicable to an incoming phone number (phone number of a person trying to contact you). Click on the column header with the corresponding rule to invoke the wizard, which will enable you to define a new rule or change an existing one.

To

Allows you to select a condition applicable to a dialed phone number (one of your phone numbers that a person trying to contact you).

Time Window

Allows you to select a condition applicable to the time when a call is made.

Action

Specifies which actions should be taken if a particular phone call satisfies the conditions for this rule.

Off

Allows you to temporarily disable a rule without actually deleting it (so it can be used later on).