Power over Coaxial (PoC) basically means that power for the camera is supplied by the DVR via coaxial video cable (RG59 or similar), this removes the requirement for separate cables and power supplies which would otherwise be needed to power your cameras. For installers this means a much more time and cost efficient installation. PoC can be used on cable runs up to 200m and is available in 4,8 and 16-Channel DVRs (models ending /P), a full complement of TVI PoC cameras are also available (models ending E) which together offer a cost effective and time saving solution to your TVI installations.