Planet Technology BT-510U - Manual (Page 115)

Note
The sender information that you configure here will be automatically appended
as header information when you send a fax.
6. Select a device to be used for fax transmissions, enable the device for
sending or receiving, and then click on the [Next] button
Note
If [Enable Receive] is selected, the device will be on standby for receiving faxes
even if it is not sending or receiving anything, and therefore will be in continuous
connection to the wireless modem (when COM Auto Connect is on).
Please decide whether to select this option based on the desired objective and/or
frequency of transmission.
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