This is typically caused by a firewall in the network path preventing TCP and/or UDP traffic, or port forwarding not being enabled for both TCP and UDP traffic, on the ports configured in the unit for VoIP/RoIP (default is 1221).
This is typically caused by a firewall in the network path preventing TCP and/or UDP traffic, or port forwarding not being enabled for both TCP and UDP traffic, on the ports configured in the unit for VoIP/RoIP (default is 1221).