[VoiceOps] Strange inbound Calls

[Brandon Lehmann]

I'll have to dig into our logs a bit closer. We've been seeing a bunch of 1s
voicemails appear from random calling numbers to one of our TFs the last few
months. I attributed it to listing the # on our ARIN and RADB entries for
our ASN but haven't had time to find the correlation.

 

 

 

From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Nick
Olsen
Sent: Wednesday, October 02, 2013 2:54 PM
To: Jay Hennigan
Cc: voiceops at voiceops.org
Subject: Re: [VoiceOps] Strange inbound Calls

 

If the call is answered by a human, They hear nothing on the other side. I
will ask our receptionist to allow the call to continue for a minute or so
and see if it hangs up at the 60 second mark.

 

Timing our own IVR. It takes exactly 60 seconds, If you press nothing to get
all the way 1 second in to voicemail. As these calls always appear leaving 1
second voicemails.

Nick Olsen
Network Operations 

(855) FLSPEED  x106

Image removed by sender.

 

  _____  

From: "Jay Hennigan" <jay at west.net>
Sent: Wednesday, October 02, 2013 2:25 PM
To: voiceops at voiceops.org
Subject: Re: [VoiceOps] Strange inbound Calls

On 10/2/13 10:13 AM, Nick Olsen wrote:
> Hello Everyone,
> 
> We've been seeing a lot of strange inbound calls to our toll free
> numbers recently. The only thing they have in common is the caller ID
> text is always a city and a state. And the the call duration is 60
> seconds on the dot..Every time.

Are the calls answered by a human? If so, what do they hear? If not
and it's an IVR, if you call and say nothing does the call drop in 60
seconds?

City and state are not uncommon for CNAM. Many CNAM providers will put
the city and state of the rate center for the NPA-NXX if caller name
isn't available.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
Impulse Internet Service - http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV
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