2.
Go to "Network > Interface > Cellular", enable cellular settings and click "Save" button.
3.
Go to "Network > Link Failover > SLA" and configure SLA probe. The default probe type is ICMP. The
destination address is the host address which can be probed by ICMP in public network or private
network. Other parameters can be kept as default value.
UR52 & UR55 User Guide
142