Dialed Number Identification Service (DNIS) is a service offered by

telecommunication Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that ...

s companies to corporate clients which identifies the originally dialed

telephone number A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices f ...

of an inbound call. The client may use this information for call routing to internal destinations or activation of special call handling. For DNIS service, the

telephone company A telephone company, also known as a telco, telephone service provider, or telecommunications operator, is a kind of communications service provider (CSP), more precisely a telecommunications service provider (TSP), that provides telecommunicat ...

sends a sequence of typically four to ten digits during call setup.

Direct inward dial Direct inward dialing (DID), also called direct dial-in (DDI) in Europe and Oceania, is a telecommunication service offered by telephone companies to subscribers who operate a private branch exchange (PBX) system. The feature provides service for ...

(DID) service also provides DNIS. For example, a company may have a different

toll-free telephone number A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls. For the calling party, a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing pre ...

for each

product line Product may refer to: Business * Product (business), an item that serves as a solution to a specific consumer problem. * Product (project management), a deliverable or set of deliverables that contribute to a business solution Mathematics * Produ ...

it sells, or for multilingual

customer support Customer support is a range of services to assist customers in making cost effective and correct use of a product. It includes assistance in planning, installation, training, troubleshooting, maintenance, upgrading, and disposal of a product. Reg ...

. If a

call center A call centre ( Commonwealth spelling) or call center (American spelling; see spelling differences) is a managed capability that can be centralised or remote that is used for receiving or transmitting a large volume of enquiries by telephone. ...

is handling calls for multiple product lines, the corporate telephone system that receives the call analyzes the DNIS signaling and may play an appropriate recorded greeting. For

interactive voice response Interactive voice response (IVR) is a technology that allows telephone users to interact with a computer-operated telephone system through the use of voice and DTMF tones input with a keypad. In telecommunications, IVR allows customers to interac ...

(IVR) systems, DNIS is used as routing information for dispatching purposes, to determine which script or service should be activated based on the number that was dialed to reach the IVR platform. In the United States, DNIS is commonly provided for 800- and 900-services.

References

Authentication methods Telephone numbers {{telephony-stub

See also

References