Denso BHT-400B-CE - Manual (Page 126)

To terminate the USB interface test
There are two ways to terminate the USB interface test--"Disconnect the USB interface cable" and
"Disconnect the link with the button in the task tray (as described below)."
(1) Double-tap the ActiveSync icon (circled in red at left) in the task
tray.
(2) The dialog appears as shown at left. Tap the Disconnect button
(circled in red).
The BHT beeps once and disconnects the ActiveSync
connection. The ActiveSync icon disappears.
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