As Shown in the below image, Tenant can Configure Digit Manipulation for the Below features from this page.
There are two options for the Manipulation.
1) Actual number
2) Digit from Right
If Actual number is selected then the number will be received will be checked against the added number and if Digit from Right side is selected as Digit is added as 10 then 10 digit from side will be checked against the number.