QMD 37x WDR Install Manual page 51

The extension wire and box are available in general electronic and phone shops.
Connect Speed Dome and PC

When PC is used as the console, installer needs to connect both of video
and RS-485 signals to PC but separately.
Most capture cards have 4 video input per card, and normally each PC has
slots for 4 cards, meaning that up to 16 cameras can be hooked to one PC.

Video:

RS485:
 Power:
.
QMD Install manual D06400210010G PTZ Dome Camera
connect the camera video to the video-in of a capture card.
the RS485 shall be connected to the RS232 or USB port
through a signal converter. Refer to the previous section for
the establishment of the RS485 network ( watch the
difference of impedance setup for terminal device against
single or multiple domes in a network )
camera's power is to be connected locally with the
supplied DC or AC adapter.
(Capture Card)
.
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