unblockable repeat robo calls

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I've been on Ringcentral for six months and like the system, but am receiving robo calls both at the office, and at home that are of a nature, so persistent and repetitive that are unfortunately, going to force me to drop the system if there is no way to fix this:

I receive REPEAT robocalls about every 5 minutes, starting around 7pm and running all night.  One is from "SIP VICIOUS" and the other is from "888070xxxyyyzzz" (and similar numbers - this has been going on for months).  Sometimes during that daytime when i'm at the office. 

The whole purpose of this system is to provide a higher quality phone system for our customers and potential customers to call in on.  But this unrestricted, constant repetitive robo calla ctivity basically, renders our RingCentral phone system deployment worthless to us. 

I've called into to tech support several times on this.  I have blocked calls without calling party ID.  But these calls don't even show up in my call log.

If RingCentral can forward the id's, fake or whatever, like SIP VICIOUS right onto my Ringcentral phone displays, why can't they allow me to block these calls?  And record them in the call log?

I have been forced to disconnect my system at night, during the day when it's plugged in, 90% of my calls are this robo junk.  

I get robo calls on my cell too, up to 15-20 per day, but they aren't as bad because they only call you once, at most 3 times a day.  But on Ringcentral, these robo callers call me repeatedly, every 5 minutes. 

Before i disconnect, i thought i would post here because i really don't want to give up on the system. I just can't deal with this though, it's too time consuming and interupts our work. 

I worked at Bell Labs for 8 years so i understand VoIP, Signaling System 7, telecom -- this seems to me to be something that could be fixed if RC wanted to.  I would think this would put Ringcental out of business over not too long of period? 

Since it's so serious of problem -- i just wonder, WHY has it not been fixed?  i've had this since i opened the account and purchased the Yealink phones 6+ months back. 

Steve B. 
Blastoff Labs
Digital Marketing Agency
Reno, NV
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Steve Bell

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Posted 10 months ago

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Brandon, Champion

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I'm not going to address the large topic of robocalls since it is discussed elsewhere in this forum and outside, but the SIP VICIOUS things stood out to me.  That is a well known pen test/hacking tool and if you are seeing that, it may indicate your phone is open to the internet in a way it should not be.  Either by having the phone use a public IP address (very bad idea) or forwarding/opening inbound ports to your phone (also bad).  Do you manage your own network and know how it is setup?

It is also possible someone just thought it was a cute CNAM to use too..


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Chris Rosa

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From the Sip Vicious blog...
In this case, however, things are a bit different. While launching an INVITE scan on a vulnerable PBX system can be useful for the hacker, doing the same thing on an IP Phone (or VoIP Phone) just makes it ring. While some phones will only ring when the correct number is called, others ring when any number (or rather, any SIP address) is specified in the INVITE message. So the attackers/hackers/cyber-criminals ended up getting phones to ring. I think this is a mistake that they were making, possibly because they are not differentiating between a phone and a PBX system.
So it sounds like a hacker is trying to find a route through a PBX system, but is just ringing your phone. Definitely look into your network setup to make sure this phone isn't exposed to the internet directly.