Solution:

Note : the xDSL line needs be a special railway line. it means a fixed IP is available. 1. Put ADAM-4571/70 in the same network, Because EDG-Configuration Utility can only scan ADAM-4571/70 in the same domain name. 2. Assign the xDSL fixed IP to the ADAM-4571/70's in EDG-Configuration. 3. After configurating ADAM-4571/70 's IP address, you can move ADAM-4571/70 to another domain network. 4. At the same time, you can use EDG-Port mapping Utility to assign the virtual com ports to HostPC. 5. In the way, the Host PC can use the remote virtual com port when ADAM-4571/70 in other network area.