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Glossary: Bandwidth Limitation

Bandwidth is an increasingly precious commodity both on your local network and across the wider Internet. Where IP video and CCTV cameras are concerned bandwidth is an important factor to consider when designing an IP CCTV system or looking to convert an obsolete analog CCTV system to IP CCTV.

Luckily, many IP cameras incorporate a facility to limit the amount of bandwidth used up by the camera at any one time. This allows those planning CCTV systems and networks incorporating IP CCTV to plan bandwidth usage with confidence.

Large IP CCTV networks should always include some form of bandwidth limitation across all or some IP cameras in order to mitigate the potentially damaging results network saturation can have on the efficacy of an organisation’s network and the security of that business’s premises.

Important bandwidth-related factors to consider when designing an IP CCTV system:

  1. Compression / quality
  2. Frame rate across the network
  3. Individual frame data size
  4. Total number of cameras in the system
  5. Times when the cameras will be actively consuming network bandwidth

These factors cumulatively construct the total bandwidth use for the system and should be calculated with the bandwidth limitation features of available IP cameras in mind. It may well be that in commissioning a large networked CCTV installation you should specify cameras with this feature or encounter potential problems of scalability down the line.

Issues with regard to bandwidth use are more significant when considering IP video transmitted over the Internet and special consideration must be given to those streams delivered this way.

Planning an IP CCTV system or network must be done carefully with regard bandwidth and the bandwidth limitation feature available in many IP cameras can help.

Published on October 2nd, 2008 by Kevin Bowyer

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