We have started to see something similar now. Except it is 2 minute long empty voicemails with return DIDs that route to nowhere. ~Jared On Thu, Oct 3, 2013 at 7:43 AM, Matthew Crocker <matthew at corp.crocker.com>wrote:
Automated system trying to probe for auto-attendant and/or voicemail holes?
-- Matthew S. Crocker President Crocker Communications, Inc. PO BOX 710 Greenfield, MA 01302-0710
E: matthew at crocker.com P: (413) 746-2760 F: (413) 746-3704 W: http://www.crocker.com
On Oct 2, 2013, at 10:31 PM, Brandon Lehmann <brandon at bitradius.com> wrote:
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
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*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 _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
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