I've been getting some rather annoying calls on my Google Voice number from someone who is blocking their Caller ID. I know that these calls are from the same person because of the voice. I want to have some fun with this person or persons to show them that they aren't so slick as they think they are. I want to set up what used to be called an "ANI trap" way back in the day. Many, many years ago in the early 2000s, there was a company that used to offer free voice mail boxes to the public. One interesting "feature" of this service was that it always passed ANI. So if anyone called the DID of the VMB, the owner of the account would always get the caller's number regardless if they blocked their number.
I would like recommendations of a free or cheap solution for accomplishing the same thing. Besides having a toll-free number, how else can I get a caller's ANI?
I do have an OBi202 ATA if that helps in recommending a solution.
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