Edimax Technology PT-31W - Manual (Page 43)

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Here are the descriptions of every setup item:
Item Description
Enable RS-485 Check this box to enable RS-485 functionality.
Use Pelco-D
Select this option and RS-485 interface will output pan-tile control signal
in Pelco-D format. This format is widely accepted by most of pan-tilt
camera cradles.
You have also input pan-tilt camera cradle’s address code in ‘Address’
field (number must be between 0~255). This code must be identical to
pan-tilt camera cradle’s address code.
Use Custom
Protocol When the pan-tilt camera cradle does not support Pelco-D protocol, you
can define a protocol’s detail by this function.
Please refer to pan-tilt camera cradle’s user manual to define the
protocol.
- Baud Rate: Select data baud rate of RS-485 interface that pan-tilt
camera cradle will accept. When the length of RS-485 connection is
very long (longer than 200M), it’s not recommended to use high
speed connection (greater than 2400bps).
- Data Bits: Select data bits of RS-485 connection.
- Parity: Select parity bit: odd, even, or space.