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1. Recommended that you limit traffic to and from your phones ONLY from RingCentral IP addresses. You may need to enage the help of an IT professional to do this. The IP ranges you should be accepting traffic from are 22.214.171.124/22 and 126.96.36.199/22
2. To help with this issue RingCentral has recently implemented encrypted SIP registration or SIP TLS. This encrypts all communications back and fourth between RingCentral and your phone. This eliminates the ability for anyone on the internet to be able to just log in to your phone. You can ask to have this enabled by calling in to RingCentral support and asking them to enable this feature.
I am an investigator and use ring central for fax service for a repo company I own. I checked the validity of phone numbers that our on my current calls and only 1 is a legitimate working number. And it is someone that I know sent us a fax. The calls last 40 seconds, most of disconnected magic jack type phones, Are you doing this to drive up my bill? I call customer service but no one speaks English and what can be discussed in 4 minutes takes 30 minutes.
I'm new to ringcentral and think it's great but lately I've been getting phantom calls from unknown and '500' that sometime ring for 5 minutes and I can't answer or direct them to the answerphone or anything.
I've had to change my ring tone to one of my favourite songs just to stop it driving me crazy!
I've rang ringcentral but they said they can't fix it, it's something I'd need to sort myself with regard to open ports on my router.
I have no idea how to fix this so any advice from someone who has had a similar problem would be gratefully received! ;-)
Periodically, the desktop app shows a call coming in from an unknown, single, or double digit number (i.e. 1). It rings and rings but when I try to answer the call, nothing happens and the app freezes up. I am unable to stop the ringing until I open task manager and shut down the app from there.
We have been getting calls to our main line (no extension) but they do not leave a message, or leave a few seconds of blank message. They are not clients or leads of ours and appear from area codes across the US.
Has anyone else had this issue? Are these likely automated telemarketing calls? Is there a do not call list I can enter? Thanks!
Our number has been posted publicly on our site for a few years. This has been a problem for the past year. I realize five calls a day might not be a nuisance for some, but we receive a small call volume and our Director has stopped answering calls altogether because most of them are "fake".
Has anyone else been receiving phantom calls?
Symptom: Our toll-free number receives a call, which is routed to my cellphone via Find Me Follow Me rules. The Caller ID shows an actual number. When I answer, there is silence. Dead air. The call remains connected as long as I'm on. If I disconnect, and then call the number back, I typically either get a generic voicemail or a voicemail that's clearly not one of my customers. These calls happen at seemingly-random times, but especially at night - 10PM, 4AM, 6AM. The first time I noticed this is Feb 25, 2015 at 2:56PM Pacific.
It SEEMS like either there never was a caller in the first place, and our phones are ringing from a call that is completely invalid, or, if there was a caller, the caller disconnected. Our greeting takes 30 seconds to play after hours, and invalid callers would normally hang up if they realized that they were calling someone by mistake - it should provide ample time to disconnect without bothering me.
This is an emergency 24/7 hotline, which needs to be manned at night. I can't just ignore the calls. I tried to get help from RingCentral support, but they said that the solution is for me to register a complaint with the FCC. I've used RingCentral for over 5 years, and can definitively state that this behavior is new and ongoing.
I don't know if there is an industry-standard term for these calls. Ghost calls? Invalid calls? Phantom calls sounded right to me. Please, if other people are having this sort of problem, share: When did it start? How frequently does it happen? Do you have any thoughts about what might be causing it? Has anyone at RingCentral worked on this problem with you? Does it appear to be specific to RingCentral? Are there alternate suppliers who either don't have this problem at all or have a solution for it? Are there reasons to believe porting my number to another carrier would make any difference?
Preparing your Network for
SIP over TCP and Secure Voice
for IT Administrators
Also, please don't confuse "ghost calls" with spammers and telemarketers.
A phantom call, or "ghost call" is identified when a customer describes receiving calls when answered there is no one on the line. They typically have a strange caller ID that does not meet the normal 10 digit standard, and if you look the call up in the call logs they do not show up.
How to mitigate
Since this is an attack that originates from the internet, the users router needs to have rules in place to prevent the attack from reaching the customer phones. This can be done by not only restricting data to the incoming ports, but also limiting that data to come from only the 2 RingCentral IP addresses.
A. Update Firewall Settings based on whitepaper:
B. Set the following IP Address: 188.8.131.52/22 and 184.108.40.206/22 as
the FROM IP address.
C. Refer to your company IT Admin for proper configuration of the network.
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