D-Link DCS 3110 User's Guide Page 7

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Migrating to IP Surveillance
Still not convinced its time to make the move?
Here are a few related questions and answers
Won’t video trac slow
the performance of my
data network?
One of the rst questions new
customers ask is the impact IP
Surveillance will have on network
performance. Fortunately, modern
streaming technologies such as H.264
can really compress video data down
to minimise the bandwidth required.
Moreover, most network switches and
routers (such as those from D-Link)
can be congured to segregate and
prioritise dierent types of trac
using industry-standard Virtual LAN
(VLAN) and Quality of Service (QoS)
technologies. As a result, a properly
implemented IP Surveillance system
should have minimal impact on
existing network applications or
their performance.
Can my data be intercepted
and used for other purposes?
As with other network applications, IP
Surveillance products are engineered
to comply with industry-standard
network authentication and security
technologies. Using these, access to
recordings can be strictly controlled
and audited. At the physical level too,
its a lot harder to intercept digital
than analogue CCTV data, making IP
Surveillance inherently more secure,
especially when using wireless to
connect cameras to the network.
Aren’t IP cameras
complicated to install?
If anything, IP cameras are easier to
install than a conventional analogue
CCTV camera, and quicker, especially
if Power over Ethernet (PoE) is used
to eliminate the need for a dedicated
AC supply. What’s more, with new
breakthrough technologies, such as,
Auto Surveillance VLAN (ASV), a
feature found in Smart Switches from
D-Link, switches supporting ASV
enhance the existing infrastructure by
automatically segmenting surveillance
data from general data. This results
in an optimised hybrid network that
is quick and easy to deploy, while
capable of handling both your data and
surveillance trac.
How can I safely monitor
my network trac during
busy periods?
It is important that video feeds from
surveillance aren’t negatively aected
during periods of busy trac congestion.
On networks with already heavy trac
loads, the approach has often been to
create a separate IP network infrastructure
explicitly dedicated to surveillance
trac. However, ASV changes all of this
by automatically detecting attached
surveillance equipment to intelligently
segment surveillance trac to give it high
priority following quality of service (QoS)
standards. In this way, surveillance trac
can continue to stream video smoothly
and reliably, even during periods of heavy
data trac. When used in conjunction
with PoE, hardware installation is
simplied, and clutter is reduced since
power and data can be transferred over a
single cable.
Will I need to switch to a
dierent company to install
and maintain my IP Surveillance
equipment?
No - most specialist suppliers already
oer support for both analogue and IP
Surveillance systems and are both willing
and able to oer impartial advice on
what’s best for your organisation. D-link
products are available through a network
of approved resellers well versed in both
analogue and digital solutions.
I’ve used a webcam and
wasn’t impressed with the
quality, won’t IP Surveillance
be the same?
Professional IP cameras are a world
apart from cheap webcams. HD-
quality, Megapixel cameras are now
commonplace along with low-light and
infrared technologies to capture detailed,
high resolution, images in varying light
conditions. High frame rates further help
together with support for both optical and
digital zoom at the camera.
Auto Surveillance VLAN (ASV)
Typical SOHO and SMB network installation
Typical larger network installation
Oce
Video Management Server
ASV
Remote Viewer/
VMS Client
(Web Browser)
D-Link Web Smart III Switch
D Link
Web
Smart
III
Swi
tch
Network Cameras
Oce
Network
IP
IP IP
ASV
ASV
Unmanaged Switch
Dedicated Switch for Network Cameras
Unmanaged
Switch
Oce
Network Cameras
Oce
Network
IP
IP IP
ASV
ASV
VMS Client
(Web Browser)
D-Link Web Smart III Switch
Network Video Recorder/
Video Management Server
ASV
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