Axis Network video Manual page 11

NETWORk VIDEO: OVERVIEW, BENEFITS AND APPLICATIONS - CHAPTER 1
viewing/recording station. Separate audio cables must also be used if audio is required. Net-
work video products can also be placed and networked from virtually any location, and the
system can be as open or as closed as desired.
> Cost-effectiveness: An IP-Surveillance system typically has a lower total cost of ownership
than a traditional analog CCTV system. An IP network infrastructure is often already in
place and used for other applications within an organization, so a network video application
can piggyback off the existing infrastructure. IP-based networks and wireless options are
also much less expensive alternatives than traditional coaxial and fiber cabling for an
analog CCTV system. In addition, digital video streams can be routed around the world using
a variety of interoperable infrastructure. Management and equipment costs are also lower
since back-end applications and storage run on industry standard, open systems-based
servers, not on proprietary hardware such as a DVR in the case of an analog CCTV system.
Furthermore, Power over Ethernet technology, which cannot be applied in an analog video
system, can be used in a network video system. PoE enables networked devices to receive
power from a PoE-enabled switch or midspan through the same Ethernet cable that
transports data (video). PoE provides substantial savings in installation costs and can
increase the reliability of the system. For more on PoE, see Chapter 9.
3115
Uninterruptible Power
Supply (UPS)
Figure 1.2b A system that uses Power over Ethernet.
PoE-enabled switch
Power Ethernet
Network camera
with built-in PoE
Active splitter
Power over Ethernet
11
Network camera
without built-in
PoE