2.1.1.3 Direct Inward Dialling (DID)/Direct Dialling In (DDI)DescriptionProvides automatic direction of an incoming call with a DID/DDI number to a preprogrammed destination. EachDID/DDI number has a destination for each time mode (day/lunch/break/night).Incoming calls with DID/DDI numbers that match extension numbers at this PBX will be sent to thecorresponding extension. Incoming calls with DID/DDI numbers that match extensions at other PBXs or trunkaccess numbers will be sent to the corresponding TIE line or trunk.[Method Flowchart]CLI works.YesYesNoDoes the call have its CLI*information and is CLI modeenabled for the time mode?NoIs the CLI destination assigned?The call is routed to theDID/DDI destination.The call is routed to theCLI destination.NoYesIs the DID/DDI number found inthe DID/DDI table?YesIs the DID/DDI destinationfor the time mode assigned?No*: Calling Line Identification (CLI) Distribution:If the CLI routing is enabled and the caller's identification number is assigned in the Caller IDTable, the call will not be routed to the DID/DDI destination, but routed to the CLI destination.The call is routed to theoperator (InterceptRouting—No Destination).A trunk call is received.Does the DID/DDInumber match anextension number?YesThe call is routedto the extension.Does the DID/DDInumber match an extensionnumber at another PBX orTrunk Access no.?YesThe call is routedto the TIE line ortrunk.NoNo[Programming Example of DID/DDI Table]DDI can be programmed as DID.26 Feature Guide2.1.1 Incoming Trunk Call Features
