TP-Link TL-SC3171 User Manual page 76

Parameter: the parameter of CGI (defined in Setting
General → URL) is from your target device. For example, move=down.
Message: message will show up in the form of Message = PTZ down. If your target device
didn't support the parameter of message, you can't see the message. So you can just take
the message as a note. For example: PTZ down.
Note:
1) You can set motion detection on motion detection page (Please go to "Setting → Advance
→Motion detection → Setting"). For more details, you can check Section 7.7.
2) Motion Detection works only when the MPEG4 function is On and the Cropping is set to Off.
Alarm input: Select the connected alarm. Sensor input1: The external sensor which is
connected to sensor input1 of the alarm input.
Parameter: the parameter of CGI (defined in URL of HTTP→General) is from your target
device. For example, move=down.
Message: message will show up in the form of Message = PTZ down. If your target device
didn't support the parameter of message, you can't see the message. So you can just take
the message as a note. For example: PTZ down.
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