Page 3 - HD-TVI Guide Unpriced

A Guide to HD-TVI ...

IP CCTV Guide

Another high definition alternative to analogue that is popular for new installations as it
can use a building’s existing IT network to transmit CCTV images from one location to
another. IP is quite liked by some installers as it can share the customers existing LAN
but this can be as much a curse as a blessing. Often the LAN is not fast enough for
the huge bandwidth required for IP CCTV and the installer can't stop the customer
altering or tinkering with their own LAN after install! This can result in call backs
when the cameras don’t work properly due to “bottle necks” on the LAN.

As IP cameras sometimes reside on a customers LAN its not officially a “CCTV” system IP-PTZ645W - Pg 46
any more as this refers to “Closed Circuit Television System” and the LAN actually
Opens it up ! Maybe it should be called OCTV IP ! Some IT departments also don’t like the
vulnerability of sharing the LAN with CCTV equipment.

Pros Cons
High definition quality More expensive than analogue
Easy CAT5 cabling Limited designs as such new technology
Good choice for IT professionals who know Not cross-compatible with older analogue equipment
what they are doing Larger hard drives required for storing recordings
Can use an existing IT network Requires networking knowledge for set up
Can suffer from network interruptions and delays
(shared resources, ie LAN)
No single worldwide IP standard as yet although
ONVIF 2 is getting better

HD

This latest HD technology offers superb HD 1080P picture quality at little extra cost to standard analogue equipment
but uses the same cable and many of the same accessories so it represents a truly affordable upgrade path.

Pros Cons
Uses existing RG59 & CAT5 type cables Higher quality so larger bandwidth used
High definition megapixel surveillance Higher quality so more HDD space used
Up the co-ax telemetry available New technology so limited designs available
Some DVRs (alienMEGAHero) take TVI, analogue &
IP cameras for an easy upgrade path
High resistance to EMI so lossless
Non proprietal so fast becoming an industry
standard with wide choice available
Closed system so reduced cyber attack risks

www.aliendvr.com 3