When installing cameras, we must consider the ease of wiring; buildings are not designed to allow easy wiring, this becomes a significant challenge for the installer.  Therefore a wide range of "wireless" cameras are now available.
Actual results though, are very disappointing:

  • Usually, a camera has to be connected to 2 wires: one for video transmission and the other for power.
  •  The wireless cameras require at least one wire for power or batteries that will last a very short period of time; we mean hours rather than days.
  •  The video transmission protocol and frequency are very important.
  •  Cheap systems use transmitters and receivers that are greatly affected by obstacles and transmit distorted images unless the components are very close together.
  •  Systems using computer technologies (TCP / IP) are more reliable but limitations are the same as a wireless network for computers; the distances and the number of walls or barriers affect reliability.
  • Some industrial systems, involving antenna installations and sophisticated equipment are reliable but are much more expensive.

In our opinion, if the video is used as an element of security, wireless cameras should be avoided unless you have a budget of several thousand dollars.