[VoiceOps] Toll-Free Fraud/Spam

[Geoffrey Mina]

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?

Thanks,
Geoff
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/voiceops/attachments/20140403/2531bdc2/attachment.html>