[VoiceOps] Fake Voicemail Anti-Robocall Tactics

[Calvin Ellison]

Can anyone speak to this "CLECs think FAS is OK because robocalls" claim?
I'd really like to tell these carriers exactly how wrong they are, if they
are. If not, we would all be collecting minutes on spam diversion instead
of blocking it.


Regards,

*Calvin Ellison*
Systems Architect
calvin.ellison at voxox.com

On Tue, Feb 16, 2021 at 11:29 AM Joel Stalder <jstalder at panterranetworks.com>
wrote:

>
>
> Agreed that the threat of carrier blocking should be a serious deterrent
> but blocking based on the SHAKEN root cert or SPID isn’t the only method.
> There is an expectation of easy/instant traceback too, which will hopefully
> generate onerous support costs for the offending carrier(s) before a BFH is
> required.
>
>
>
> I think of caller verification and spam/fraud/robocall mitigation as two
> potentially related but separate tools. If my network receives a call that
> is SHAKEN-verified but has a very high spam/fraud/robocall score, it’s
> blocked (SIP 608 response). The FCC has provided legal “safe harbor” to
> block such calls without the potential threat of liability, as long as the
> required processes are in-place to remove erroneous blocking.
>
>
>
> -Joel
>
>
>
> *From:* VoiceOps <voiceops-bounces at voiceops.org> *On Behalf Of *Paul
> Timmins
> *Sent:* Tuesday, February 16, 2021 10:45 AM
> *To:* Nick Olsen <nick at 141networks.com>; Karl Douthit <karl at piratel.com>
> *Cc:* Voiceops.org <voiceops at voiceops.org>
> *Subject:* Re: [VoiceOps] Fake Voicemail Anti-Robocall Tactics
>
>
>
> I expect that people will attest spam. But we're allowed to block carriers
> by spid if we want if we start getting garbage. The effective telecom death
> penalty that'd create (along with the liability) will be an interesting
> enforcement mechanism.
>
>
> ------------------------------
>
> *From:* VoiceOps <voiceops-bounces at voiceops.org> on behalf of Nick Olsen <
> nick at 141networks.com>
> *Sent:* Tuesday, February 16, 2021 1:27 PM
> *To:* Karl Douthit
> *Cc:* Voiceops.org
> *Subject:* Re: [VoiceOps] Fake Voicemail Anti-Robocall Tactics
>
>
>
> My faith in STIR/SHAKEN has all but collapsed. I think we're just going to
> end up in a situation where even the SPAM is attested. At least having a
> breadcrumb to follow might help.
>
>
>
> Given the current state of SS. I won't hold my breath.
>
>
>
> On Tue, Feb 16, 2021 at 12:44 PM Karl Douthit <karl at piratel.com> wrote:
>
> Stir will only help if carriers actually pass or allow tokens.  Still
> waiting on several tier 1 carriers to take them.
>
>
>
> On Tue, Feb 16, 2021 at 9:35 AM Glen Gerhard <glen at cognexus.net> wrote:
>
> Hopefully Stir/Shaken will make this a moot point. Calvin, are you saying
> that a 608 is the recommended response for a call that is being rejected
> due to S/S attestation or CVT reasons?
>
> ~Glen
>
> On 2/16/2021 8:19 AM, Calvin Ellison 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
> +1 (213) 285-0555
>
> -----------------------------------------------
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> --
>
> Glen Gerhard
>
> glen at cognexus.net
>
> 858.324.4536
>
>
>
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>
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>
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> Karl Douthit
>
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