# ANI/DNIS/ISDN Number Description

## Description

Automatic Number Identification (ANI) and Dialed Number Identification Service (DNIS) identify numbers that are transmitted on an incoming trunk from the Central Office (CO).

ANI provides the caller's telephone number (and name if supported); DNIS provides the number dialed by the caller. The ANI/DNIS/ISDN Number Delivery feature allows the system to identify and use these digits when they are received.

NOTE: Not all incoming trunks provide ANI/DNIS digits (see ANI/DNIS Protocols).

## ANI/DNIS Protocols

The ANI/DNIS feature supports MCI and US Sprint standards. US Sprint trunks carry both ANI and DNIS numbers, and MCI trunks carry ANI numbers only.

- MCI ANI Protocol

- US Sprint ANI/DNIS Protocol

## Conditions and Feature Interactions

The ANI/DNIS feature interacts with the following:

- Automatic Call Distribution (ACD)

- Digital Private Network Signaling System

- HOST COMMAND INTERFACE® (HCI®)

- Station Message Detail Recording (SMDR)

## Using ANI/DNIS Numbers

The system can route DID calls based on the DNIS number.

The following system resources and applications can use ANI/DNIS information:

- IP display telephones and consoles
  Prime and non-prime directory numbers as well as key line and multiline appearances of directory numbers

- Automatic Call Distribution (ACD)

- Station Message Data Recording (SMDR)

- HOST COMMAND INTERFACE (HCI)

- Digital Private Network Signaling System (DPNSS) Interface

- Advanced Analog Network (AAN) Description

Related Topics

- ANI/DNIS/ISDN Number Delivery Conditions

- ANI/DNIS/ISDN Number Delivery Programming