Why use Siamese?
It is a great solution because only one cable is needed for powering security cameras while relaying the video information. This cable has the ability to reliably carry power and data signals up to 1000 feet. This cable has 18 AWG conductors for the power, and comes on an easy-pull, wooden spool.

Advantage :

1) durable and can be run in long distances without interference. You can also cut each security camera run the exact length that you need.

2)You will need to attach BNC connectors to each end of the RG59 coax part of the cable for the CCTV video transmission.

3)  BNC connectors are available in twist on, crimp on, and compression types. 

4) 500 foot spools of RG59 are also available. 

5)allows installers to run both the video and power to security cameras using a single cable run