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cctv
ANOTHER TECHNO BATTLE – this
time it’s Coax vs Cat 5
Within the technology sector, there are always secret battles taking place.
And these aren’t just new, they have been happening for a long time.
How many of you are old enough to
remember the Betamax v VHS fight?
DVD+R v DVD-R? And now you have
Android v Itunes. Well, there’s another
battle which is taking place with the
CCTV industry. Coax v Cat5.
From as long as CCTV has been around,
Coax has always been the cable which
has primarily been used. RG59 Coax to
be precise. Add a BNC connector to both
ends and plug one side into the camera
and the other side into the DVR and away
you go. This is the way the traditional
engineer has been installing. But now
slowly increasing in numbers is another
cable and another method. CAT5e which
as most people know is twisted pair, but
instead of adding a BNC plug, you have to
crimp a RJ45 plug and then this is the part
which the traditional engineer is afraid of,
assigning IP addresses.
‘Some bright sparks
sat down and thought
with miles and miles
of coax cables in situ,
why not make use of the
existing infrastructure
– and they came up
with this design’
Engineers are used to plugging in and
seeing a picture, but when it comes to
assigning IP addresses, gateways, subnets,
bandwidth, they tend to shy away. Hence
another format was introduced, HD
SDI. In simple words, HD images over a
traditional Coax cable. Some bright sparks
sat down and thought with miles and
miles of coax cables in situ, why not make
use of the existing infrastructure – and
they came up with this design.
To read more, visit www.locksmithjournal.co.uk
So what’s the difference?
HD-SDI works in the traditional way as
analogue. You simply use good quality
RG59, crimp a BNC on both ends and plug
in and away you go. The images are HD
and recorded on a HD DVR. Simply you
are able to provide a client HD Images
in the conventional format Cameras to a
DVR. And yes, the pictures are 1080p HD
resolution, crystal clear and sharp.
‘The images are HD and
recorded on a HD DVR. Simply
you are able to provide a client
HD Images in the conventional
format Cameras to a DVR’
Pros:
• No Need for add