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Connect your serial cable to the device (directly or through a USB-serial adapter).
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Open the Control Panel, and then open the Device Manager.
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Identify the COM port as shown in the following illustration.
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Start PuTTY.
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In the right pane, change the Connection type to Serial.
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In the right pane, type the appropriate COM port. Make sure that the serial configuration parameters are set as follows:
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Click Open to start a serial session.