We have had a few of our dealers and customers successfully connect the Furuno DRS4W and our NAVLink2 together, so that you have one wireless network.
The Furuno DRS4W must be the wireless Access Point and you have to tell our NAVLink2 to connect to the Furuno wireless network in Station mode – this is configurable in the NAVLink2 web interface SETTINGS page.
When the NAVLink2 connects to the Furuno network, you will not know what IP address it has received, so it is important that you use UDP mode for receiving the NAVLink2 data, as this works without knowing the IP address – you just enter 0.0.0.0 and Port 2000 in Navionics.
You should still be able to access the NAVLink2 web interface at http://navlink2.local
If you get in to any trouble and lose access to the NAVLink2, you can always factory reset the unit by pressing and holding its RESET push button for >10 seconds. This will put it back to its default Access Point mode and you can try again.