Can I connect our edge modem to your RF102S RS232 WAN port and configure this for shared Internet connectivity to any home network?

Yes, you can connect your edge modem on the RF102S for shared Internet access. You must make sure your edge modem is pre configured and saved with all the settings so the RF102S does not need to configure it.

Instead of using RF102S, you may want to consider the RF550, RF560 or RF820. The RF550, RF560 and RF820 are much easier to configure and it uses standard browser without requiring special windows software.