Design of CCTV (Closed Circuit TeleVision): modern surveillance systems can be divaided on two major tips:

1.Ethernet based systems – IP cameras and video servers (DVRs) using SCS (Structured Cabling Systems) for phisical layer to trasmit video over Ethernet frame and protocols TCP , UDP , HTTP , DHCP и др. Managment and setup from PC through WEB interface and software. High quality of recording. Mounting in 19″ standard telecommunication rack.

2.Clasic coaxial based systems – Cameras with TV out, multiplexers, quads, switchers, time laps recorders and etc.

Usefully: Dependence between lens size and distanse to observe Lens.

Function and characteristc of CCTV systems:

• Motion detection .
• Recording after alarm or on specific time schedule.
• Managment of cameras – Zoom , Pan Scan .
• E-mail or SMS after alarm.
• Cameras can be mouned otside with housing and inside.
• Web access.
• Alarm outs and ins.
• Multiplexing.