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Network Connectivity - How can I resolve Sangoma phone connection issues when using a Cisco RV120W Firewall/Router?

Network Connectivity - How can I resolve Sangoma phone connection issues when using a Cisco RV120W Firewall/Router?

    1. Login to your Cisco RV120W. The IP address is 192.168.1.1 by default.

    2. Use admin for the username and password.

    3. Navigate to Firewall-Basic Settings-Attack Check.

    4. Enable Respond to Ping on WAN.

    5. Disable all other settings under Attack Check.

    6. Under Firewall-Basic Settings-SIP ALG, disable SIP ALG.

    7. Under Firewall-Session Settings, change UDP Session Timeout Duration to 300.

    8. Under Networking-WAN-IPv4 WAN Configuration, change MTU Type to Custom and MTU Size to 1500.