TRENDnet TV-IP301W - Manual (Page 41)

40
RS-485
The RS-485 page contains the control settings for external device
through the I/O port. Once you have changed the settings in each
option, click Save to store the settings.
NOTE: When you enable RS-485 function of the camera, it will provide the
additional control buttons on the View Image screen. See the illustrations on
page 55, 56.