[VoiceOps] Toll-Free Fraud/Spam

Geoffrey Mina gmina at connectfirst.com
Thu Apr 3 12:00:56 EDT 2014

We are seeing a relatively high number of strange calls hitting a portion of our Toll-Free numbers.  The ANIs are mostly disconnected/invalid.  When our system answers, we hear silence, a DTMF tone, and then a fast busy on the inbound RTP stream.

We are seeing this over multiple TF vendors.  Is anyone else seeing anything like this out in the wild?

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