Known Issues

1. DNS server addresses need to be changed to set of efficient DNS servers, like Google's DNS or another DNS, to prevent intermittent registration failures on Polycom phones.
2. WAN ping response to our Call Quality Monitoring and Troubleshooting Servers needs to be enabled.

Resolution

1. Log in to the router.
2. Go to Setup > Basic Setup and change the following:
   
   • Static DNS 1: 8.8.8.8
   • Static DNS 2: 8.8.4.4
3. Click on Save Settings.
4. Go to Security > Firewall and change the following:
   • Firewall Protection: Enable.
   • Block Anonymous Internet Requests: Unchecked.
     
     • This optional step is needed for call quality monitoring and troubleshooting purposes.
   • Filter Multicast: Checked.
   • Filter Internet NAT Redirection: Checked.
   • Filter IDENT (Port 113): Checked.
   • Click on Save Settings.