We used to get about $1k/month worth of those charges because people would 
spend literally hours in the IVR. Dozens at a time. We straightened that out 
and then all of the junk calls went away.




--
Mike Hammett

----- Original Message -----
From: "Ken Hohhof" <[email protected]>
To: "AnimalFarm Microwave Users Group" <[email protected]>
Sent: Friday, August 29, 2025 11:35:55 AM
Subject: [AFMUG] traffic pumping schemes





I seem to remember news from states including Utah awhile back where small 
local LECs were striking revenue sharing agreements with operators of sex chat 
lines and the like to pump traffic that the LEC would charge a big long 
distance company for completing. The more traffic they pumped to these numbers, 
the more they profited. I don’t remember the details, and I think whether it 
was illegal or contrary to FCC rules was in dispute. 



So I have a VoIP customer who started getting ridiculous bills for their toll 
free number. (We provide their local service but a third party Lingo redirects 
their 800 number.) The customer thinks it was connected to a rise in off hours 
max length voicemails, although I question if the math works out to the huge 
amounts they were being billed by Lingo. 



We reduced the max voicemail length from 15 minutes to 5, and they think 
whoever was leaving the long messages gave up. 



Does this make any sense? Why would they target a toll free number 
specifically? And I thought they made money for terminating the call, not 
originating it. And would they actually notice that VMs are now being cut off 
earlier and stop calling? 



This customer also had 2 or 3 toll free number on their bill that are not 
theirs. For example 800-557-4273. I called this number and it’s a recorded 
message with a scam for a $100 gift card or something like that in return for a 
$1.99 credit card purchase, that’s apparently a known scam going back many 
years. These TF calls are NOT going to this customer’s local DID. Could that be 
a traffic pumping scheme, could the mystery TF number be redirecting to local 
DIDs with the calls terminated by a small rural LEC? 



I could be barking up the wrong tree and this has nothing to do with traffic 
pumping, maybe Lingo is just overcharging them. But nobody seems to be able to 
explain why they started getting these max length overnight VMs of just 
background noise. I did tell them that a TF number, especially since that’s 
what they have on their website and Facebook page, is like a blank check, you 
will pay by the minute for anyone who wants to call your number. 
-- 
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