Direct Dialling Inward (DDI)

DDI is the most effective method for automatic inbound fax routing, as each user has an individual fax number. An Ascom fax router is required in addition to the FaxPress server for DDI. The Ascom fax router uses a EuroISDN Basic Rate connection to the phone network, either direct or via a PABX. The EuroISDN network supplies DDI information associated with each incoming call, indicating which number was actually dialled by the caller, and the Digital Fax Router passes this to the fax server at the start of the call. The fax server uses its look-up table associating DDI codes with users to alert the right user, in the right way. For example, whenever the user next logs on, and wherever he logs on from, he can be alerted to the presence of his incoming faxes.

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