168 Configuring Enterprise Edge ServicesEnterprise Edge 2.0 Programming Operations Guide P0911588 Issue 01• Under Hardware, choose DTI (PRI) and select the protocolProgramming Call by Call service selectionProgramming the Enterprise Edge system for Call by Call Service Selection with aPRI interface requires:• Provisioning a DTI as PRI if a DTI configured as PRI is not already a part of thesystem, see the Maintenance section.• Selecting a protocol, on page 99.• Programming incoming call routing, on page 152.• Programming routes that use the PRI pools, seeCall Routing on page 128.CbC limitsPRI pool limits for Call by Call services allows you to configure limits for servicetypes without interacting with the CO. This feature sets the minimum and maximumnumber of incoming and outgoing calls per service type for the PRI pool.The number of active calls will be tracked and whenever a call is being setup, acheck will be made to determine if it will be allowed. Calls will not be allowed ifthey exceed the maximum value for that service type or if they will use lines neededto maintain the minimum value of other service types.The summation of the minimum values for incoming or outgoing PRI servicescannot exceed the total number of lines in the PRI pool.The maximum value for an incoming or outgoing PRI service cannot exceed thetotal number of lines in the PRI pool.Programming CbC limits1. From General Settings, CbC limits, select a pool (PRI-A to PRI-F) thatsupports Call by Call routing.2. Select a service.The services that display depend on the protocol.3. Type a number if required under Min incoming:2.4. Type a number if required under Max incoming:23.5. Type a number if required under Min outgoing:4.6. Type a number if required under Max outgoing:23.