D-Link DCS-4703E Guide D'installation page 8

Waterproofing Your Installation
To waterproof your camera installation, follow the instructions below. Round
Ethernet cable, a crimping tool, and RJ-45 plugs are required for this
procedure.
Place the washer around the base of the Ethernet
connector as shown.
Thread bare Ethernet cable through the waterproof
connector as shown, then crimp an RJ-45 plug onto
the cable.
Connect the RJ-45 plug into the Ethernet connector,
then screw the waterproof connector to the Ethernet
connector by turning it about a half-turn clockwise.
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D-Link DCS-4703E Quick Installation Guide