When the ScanSnap is used in Direct Connect mode, the privacy separator is always enabled which prohibits the communication among clients (e.g. computer and mobile device) connected to the scanner.
Also, ScanSnap iX100 cannot connect to the Internet. Thus, ScanSnap iX100 cannot be used as a general wireless access point.
If you want to hide the wireless network (SSID) when using the ScanSnap in Direct Connect mode, select [Direct connection setting] > [Wireless LAN setting] with ScanSnap Wireless Setup Tool and uncheck the [Network Name (SSID) Notification] checkbox.