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Direct Inward Dialling 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 other numbers as needed by the business, within limits.

• When calling an extension that is busy, set the system to call you when the extension becomes free. This feature is also called "Ringback When Free".
• When calling an extension that just rings, set the system to call you when the extension is next used. This feature is also called "Ringback When Next Used".

Avaya IP Office Phone System Features List

New! Have you seen our new Avaya IP Office Phone System site at http://officephonesystem.co.uk? Every IP Office Phone System feature has been updated there, and it also includes all the latest information about Avaya IP Office Release 9, out September 2013.