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Direct Inward Dialing (DID / DDI)

This relies on the local telephone exchange passing all or part of the dialed number to the IP Office. This number can then be used by IP Office call routing software to route the call to an individual phone, or groups of phones. This service is typically used to reduce the workload on a reception position by giving members of staff or departments individual numbers so they can be called directly. For convenience it is common to have the extension or group number the same as the digits supplied from the network, but IP Office can convert the number to what ever number is needed by the business, within limits

In North America, T1 circuits are required for DID.

 

© 2010 AVAYA
15-601041 Issue 20.f.-
18:14, 25 February 2010
(direct_dial_in_(ddi).htm)

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Last Modified: 09/06/2008