[cisco-voip] PSTN Calls Incorrectly Flagged as "Potential SPAM"

[Ryan Huff]

I’ve seen this happen on my Verizon cell recently. Was very surprised, it was the first time I had ever seen it.

CNAME dips and presentation are done by the called party’s carrier, so there isn’t anything (functionally) the calling party’s PBX can do to influence that. CNAME inserts are done by your upstream carrier, so if something has actually been modified in the CNAME database for your ANI, your upstream carrier would have done it.

The only real actionable thing I think you can do (besides changing your ANI to something else), is what you’ve done. Call your upstream carrier and give them call samples where your call was delivered by the called party’s carrier and masked with incorrect ANI. Let the carriers fight each other on the carrier level.

Sent from my iPhone

On Apr 3, 2020, at 12:13, JASON BURWELL via cisco-voip <cisco-voip at puck.nether.net> wrote:


More and more I have users reporting that their outbound PSTN calls are showing as “Potential SPAM” on called party phones. Its causing some real problems because these are legitimate calls that the customer in many cases has requested but they are ignoring it due to the message and if they don’t have voicemail set up or its full they have the perception we are not returning calls. I’m assuming the Caller ID name in the national Database is being substituted with this message by the wireless carriers. We don’t do any telemarketing so there is no reason why our calls should be flagged with SPAM. I’ve reached out and received little help from Verizon or AT&T. Wondering what other are doing to get numbers “white listed” as I’m sure I’m not the only one facing this. Thanks Jason


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