Why do I keep getting ghost/phantom calls?
Receiving multiple ghost/phantom calls from is actually a result of malicious intent. "Hackers" use a program called SIP vicious to probe networks and compromise phones. You can validate one of these attacks if your phone rings with a suspicious caller ID ("100") and in your RingCentral call log it will not show the call. This means the call did not come through RingCentral servers, and the attackers have found a way in to your network.
How do I fix this?
It is recommended that you limit traffic on your phones with ONLY RingCentral IP addresses. You may need the help of an IT professional to do this.
The IP ranges you should be accepting traffic from are as follows:
IMPORTANT: VIEW THE LATEST RECOMMENDED NETWORK CONFIGURATION SETTINGS HERE:
RingCentral Network Requirements and Recommendations - Expanded version
RingCentral Network Requirements and Recommendations