Dialed Number Identification Service (DNIS) is a feature of Yeastar IPPBX, which could be used to determine which trunk was dialed by the customer. With this feature enabled, the caller ID display on the IP phone will include both the information of the calling party and the information we set up for the called party.
For example, a company may have a different toll-free number for each product it sells. If a call center is handling calls for multiple product lines, the operator that receives the call can know which product line the caller is looking for so that he can answer with an appropriate recorded greeting. A company may also use multiple toll free numbers for multilingual customer support, for which each support language is associated with a dedicated toll free number. With DNIS feature, we will be able to easily know which number the customer dialed from the IP phones.
1. Set up DNIS for PSTN
DNIS name: A name will be displayed as caller ID (name) when there is an incoming call on this PSTN line.
2. Set up DNIS for each DID of ISDN trunk
DNIS name: A name will be displayed as caller ID (name) when there is an incoming call coming through this trunk.
DID number: The number of the ISDN trunk.
Figure 2. Set up DNIS for each DID of ISDN trunk
Figure 3. Screenshot of the IP phone after enabling DNIS