How do ANI fails occur?
ANI fails can occur when the tandem office completing a call didn’t receive ANI from the central office originating the call. ANI fails can also be caused when ANI is intentionally not sent, this can happen by using a method called op diverting. Another way you can cause ANI fails is through the use of the AT&T long distance network. Simply dial 10-10-288-0 or dial 0 and ask your operator for AT&T. When AT&T comes on the line simply touch tone in a toll free number and the call will be completed with no ANI. Note however that this method is dependent on the AT&T center you reach, some AT&T centers still forward ANI, others send an AT&T BTN as ANI, but most AT&T centers currently don’t forward ANI.
