ALERT

[FREE DEMO] Deploy Your Enterprise Cloud in Minutes

Automatic Number Identification (ANI)

Definition - What does Automatic Number Identification (ANI) mean?

Automatic number identification (ANI) is a feature that allows a telephone to show the number of the calling party. How this information is provided is determined by the service provider. This allows users to screen their calls. ANI is also used by emergency call center dispatchers.

ANI was created by AT&T for the purposes of internal long-distance billing. It is separate from caller ID, which is a newer service that serves a similar function, but uses different underlying technologies. In the United States, ANI is part of Wide Area Telephone Service (WATS).

Techopedia explains Automatic Number Identification (ANI)

ANI describes the two-way radio selective calling functions that identify transmitting users. Customers purchase WATS as it employs a provision for prospective customers to call the number toll free. Customers are issued a separate toll-free telephone enclosing numbers beginning with special area codes. The subscribers to these numbers are termed as Inward WATS subscribers.
Unlike caller ID, ANI is resistant to blocking and is offered to commercial customers who are interested in knowing the numbers for the calls they receive.

The ANI service is provided by sending a digital multifrequency tone along with a call. The data burst has a unique number ranging from one to eight digits in length. A caller's telephone number is captured by an ANI service even if caller ID blocking is activated in it. The telephone company switching office at the destination provides the caller's telephone number to ANI delivery service subscribers. Residential subscribers can also access ANI data through some third-party companies that charge for the service. Calls through VoIP service and calling cards send a working number as ANI.

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
Tweat cdn.techopedia.com
"Techopedia" on Twitter


'@Techopedia'
Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Resources
The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.