[VoiceOps] Fake Voicemail Anti-Robocall Tactics

Brooks Bridges brooks at firestormnetworks.net
Tue Feb 16 11:50:16 EST 2021


I would posit that outpulsing a specific ANI with authorization of, and 
at the request of, the number's owner doesn't really fall under the 
colloquial understanding of "spoofing".  I think that term is typically 
used to imply malice or deceit.

On 2/16/2021 8:44 AM, Carlos Alvarez wrote:
> But the ridiculous side of this is that there are valid reasons to 
> "spoof" numbers.  We have two customers who need to do it all the 
> time, and it's legal, as well as demanded by their customers.
>
>
> On Tue, Feb 16, 2021 at 9:37 AM <paul at timmins.net 
> <mailto:paul at timmins.net>> wrote:
>
>     Legal or not it’s genius. Humans will notice right away and it’ll
>     cost for the robocallers.
>
>     Sent from my iPhone
>
>>     On Feb 16, 2021, at 11:23 AM, Calvin Ellison
>>     <calvin.ellison at voxox.com <mailto:calvin.ellison at voxox.com>> wrote:
>>
>>     
>>     Today we received a notice from one of our underlying
>>     carriers that included the following statement:
>>
>>         * If a customer spoofs an ANI that they do not own, the
>>         clec's can forward to call to a voiceless Voicemail
>>         which appears to be FAS.
>>
>>
>>     Is there any legal device that actually supports this practice?
>>     I'm looking for a specific statute, FCC rule, precedent in a
>>     judicial ruling, or the like.
>>
>>     The FCC has ruled that the SIP 608 response code is to be used
>>     for signaling when a call is rejected. I doubt the FCC or FTC has
>>     ruled that terminating carriers are permitted to cause loss of
>>     trust and revenue between upstream intermediate and originating
>>     carriers.
>>
>>
>>     Regards,
>>
>>     *Calvin Ellison*
>>     Systems Architect
>>     calvin.ellison at voxox.com <mailto:calvin.ellison at voxox.com>
>>     +1 (213) 285-0555
>>
>>     -----------------------------------------------
>>     *voxox.com <http://www.voxox.com/> *
>>     5825 Oberlin Drive, Suite 5
>>     San Diego, CA 92121
>>
>>     Voxox
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