ISDN PRI and BRI / 157P0881591 Issue 01 Modular ICS 4.0 System Coordinator GuideOutwatsOutwats is for outgoing calls. This allows you to originatecalls to telephones in a specific geographical area called a zoneor band. Typically a flat monthly fee is charged for thisservice.InwatsInwats is a type of long distance service which allows you toreceive calls originating within specified areas without acharge to the caller. A toll-free number is assigned to allow forreversed billing.Consult your customer service representative to determinewhether or not this feature is compatible with your provider.Dialing Plan and PRIThe Dialing Plan supports PRI connectivity to public andprivate networks. The dialing plan is a collection of featuresresponsible for processing and routing incoming and outgoingcalls. All PRI calls must go through a dialing plan.The Dialing Plan• allows incoming calls to be routed to sets based on servicetype and digits received• allows Enbloc dialing by buffering user-dialed digits untila complete DN has been dialed• provides the ability to map user-dialed digits to a servicetype on a Call by Call basis• allows long distance carrier selection via user-dialedCarrier Access CodesConsult your customer service representative to determinehow your dialing plan is configured.