Cat5e/6 unshielded twisted pair is recommended when used with CCTV baluns unless it is an electrically noisy environment such as an industrial plant in which case shielded twisted (STP) is recommended for additional noise immunity. If STP is used, the shield must be grounded at least on one end, if not both.
In case of ground loop, a ground loop isolation balun may be installed on one end to break the ground loop.
example: http://muxlab.com/product?category=cctv&product=cctv-pass-thrugli-balun&pid=37
The 500136-US has an integrated 350VA power supply that feeds 24 or 28VAc (or no power) to any port on the hub. Also, remote power is allocated to 3 twisted pairs yielding 50% more distance for remote power over Cat5e/6. The psu integration also means less rack space is needed. It only uses 2U.