Direct Inward Dialing (DID/DDI) relies on the local phone exchange passing all or part of the dialed number to IP Office.
Call routing software routes the call to an individual phone or a group of phones. Use this feature to reduce the workload on a receptionist by giving staff members or departments individual numbers for direct calls. Typically, the extension or group number is the same as the digits supplied from the network, but IP Office can convert the number to another number as needed within limits.
T1 circuits or SIP Trunks are required for DID. No support for Analog DID Trunks