What is “DNIS”?
Dialed Number Identification Service (DNIS) is a carrier-based service that allows incoming phone calls to be routed to a pre-determined phone(s), attendant position, call center, voicemail box or just about any answering position, with its routing determined by the phone number that was dialed by the outside caller. DNIS is a feature almost always associated with digital trunking (PRI or T1 voice service). This is because multiple incoming (DNIS) phone numbers can be assigned to a single digital trunk without the need to allocate individual trunkline circuits for each number. This “dynamic allocation” allows a company to procure an unlimited amount of individual phone numbers (some have hundreds of numbers in use or reserved) for different purposes as long as the total amount of simultaneous calls do not exceed the amount of trunk circuits available. Examples of DNIS routing applications: …Multiple companies sharing trunklines can use DNIS to route incoming callers to their respecti
