BT-510U/BT-520U Class 1 / Class 2 Bluetooth V2.0 USB Adapter User's Manual

The [Fax properties] window will appear.
2. Select the [Device] tab, right-click on the modem you wish to use,
and then click on [Properties].
3. Select the [Send] tab, and then confirm that "Enable device to
send" has been checked.
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