Direct Inward System Access (DISA)

System Feature	Description
Definition	Direct Inward System Access is a facility allowing external users (voice calls) to call in to a PBX and get access to a limited set of the PBX’s features. The primary application is the ability for users to charge expensive long distance calls to the PBX. A DISA call can be established by the use of Direct In-dialing external lines or manual external lines. These lines have to be connected to a DTMF code receiver to provide end-to-end signaling.
Settings	The DISA is configured by the administrator.
Procedure and function	A DISA number is a unique number within the numbering plan for that specific PBX. DISA is accessed by dialing this unique number followed by the feature code, the authorization code and the desired number. There is only one call access to DISA. After a call has been terminated, the user must clear down before the next call setup. All costs incurred are charged to the Call Information Logging code tied to the common authorization code dialed. The authorization code can be omitted.

System Feature

Description

Definition

Direct Inward System Access is a facility allowing external users (voice calls) to call in to a PBX and get access to a limited set of the PBX’s features.

The primary application is the ability for users to charge expensive long distance calls to the PBX. A DISA call can be established by the use of Direct In-dialing external lines or manual external lines. These lines have to be connected to a DTMF code receiver to provide end-to-end signaling.

Settings

The DISA is configured by the administrator.

Procedure and function

A DISA number is a unique number within the numbering plan for that specific PBX. DISA is accessed by dialing this unique number followed by the feature code, the authorization code and the desired number.

There is only one call access to DISA. After a call has been terminated, the user must clear down before the next call setup. All costs incurred are charged to the Call Information Logging code tied to the common authorization code dialed. The authorization code can be omitted.

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