Port triggering allows you to give specialized Internet applications (RingCentral service) within a private or local network, such as VoIP or IP Phone services, access to the Internet. This will also help you with audio issues you may be experiencing with your RingCentral service.
This article discusses how to configure port triggering on a Linksys router.
Access your router’s web-based setup page.
Click Applications & Gaming.
Select Port Range Triggering.
Under the Application Name column, enter "RingCentral" to represent the software.
Enter the port numbers of the computer application in the required fields. For the list of port, go to RingCentral Network Requirements and Recommendations.
Click Save Settings.