The Administrative IP port should be used for Running Initial Setup as well as all management related functionality from the web browser.
Application Ethernet Ports
When two or more LAN Ethernet ports are on the same Bridge (as in the factory-default Sonus SBC 1000/2000 configuration), they must not be connected to the same Ethernet switch or Ethernet network. Doing so creates a broadcast loop in the Ethernet network, rendering the network unusable. You may work around this issue by connecting the Ethernet ports directly to an intelligent switch or router running a spanning tree protocol.