I experienced the same problem over the last few months. There would be calls from spoofed numbers that would call the toll-free number and just hang there for multiple hours. When I got around to fixing the problem it had cost me about $100 between 4 separate calls.
What was happening is the call would end up in a VM and just sit there silently. Since most VMs are very short anyway, I limited the maximum length to 3minutes and that solved the problem. > On Apr 20, 2014, at 17:44, Matthew Gamble <[email protected]> wrote: > > It also could be someone targeting voicemail systems for attack and using > the toll free number to access the PBX. That's quite common. >> On Apr 20, 2014 5:07 PM, "Philip Mullis" <[email protected]> wrote: >> >> The provider benefits from these type of attacks. >> Also competitors of a target company have also known to take joy in racking >> up a competitors bill. >> >> If you finding there from a consistent set of numbers or anonymous filter >> or drop accordingly. >> >>> On Apr 20, 2014 4:44 PM, "Bruce N" <[email protected]> wrote: >>> >>> Happy Easter / Spring to ya'll. >>> >>> Has anyone seen a drastic increase on their toll-free inbound calls which >>> results in high charges from provider? >>> >>> Is this a new type of attack? Who might benefit from this type of attack >>> and how to mitigate it? >>> >>> - Bruce >> --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
