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2.4 ISDN Attended Features
2.4 ISDN Attended Features
Direct Dialling In (DDI)
Description
Provides automatic direction of an incoming call from ISDN to a specific extension.
To realise this service, the DDI number informed from ISDN is required. The DDI number is
converted to a DN or FDN of the destination using a pre-programmed conversion table.
This is an ISDN version of DID (Direct Inward Dialling) service.
Assignable destinations are:
1.
Regular extension with DN
2.
Virtual extension with FDN
—External Pager (TAFAS)
—Modem (Remote System Administration)
—Extension Group
—Phantom Extension
Call Flow
Receives the DDI number from ISDN.
Modifies the DDI number according to DDI Digit Modification.
Determines the destination DN or FDN according to
"DDI/DID Number
Digits Modification Procedures
The System modifies the DDI number according to the following three parameters.
1.
Digits to receive DDI / DID
The number of digits effective in the received DDI number.
2.
Digits to delete
The number of digits to be deleted from the beginning.
3.
Number to be added
The dials to be inserted at the beginning of the digits processed in Step 2.
340
Transformation."
Features Guide
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