Missing or Not Receiving Calls on VoIP
When the IAD or ATA is not able to be registered with the VoIP provider, you will not be able to receive any incoming calls. In the case that you do have a voicemail set up, all of your missed calls will be routed to the voicemail.
With no voicemail, the caller will receive a message that the call cannot be placed or the call will fail entirely.
A call may fail because you are experiencing a loss in your internet connection or a loss of power.
Often times, a power outage will occur and the VoIP system will need to be reset or plugged back in again. Additionally, you may not be receiving calls because the signal to the IAD is being blocked potentially by a router failure or a failure of the firewall.
When the internet connection itself is lost, you may need to contact your internet service provider for help with getting online again.
If you are frequently experiencing missed calls you can look into a feature that many VoIP providers have which is an option to forward calls in the event of loss of registration.
With this feature, if the Internet connection is interrupted or lost, any calls will be forwarded to your preset number. If you don’t select this feature, do consider getting voicemail enabled so you can have your calls routed.