Specifications

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IP Video Tips:
Tip No. 1 Going Wireless
Ethernet based wireless systems can be an ideal
solution for bridging or extending the reach of a
wired IP Video network. The Institute of Electrical
and Electronics Engineers (IEEE) released the
802.11 wireless LAN standard in 1997. This
standard, which has been amended over time,
outlines the frequencies and data rates used.
•
802.11 operated in the 2.4 GHz ISM band at
data rates of 1 and 2 Mbps.
•
802.11b/g operate in the 2.4GHz ISM band at
data rates of 11 and 54 Mbps respectively.
•
802.11a operates in the 5 GHz UNII band at
data rates up to 54 Mbps.
•
802.11n operates in the 2.4 GHz and/or 5.8
GHz bands at data rates up to 300Mbps.
It is important to remember that
data rates indicate the maximum
possible transmission speed
before any outside factors
are calculated. For wireless
transmission these factors
include interference from
other wireless products,
distance and physical ob-
structions. Throughput is the
true amount of data trans-
mitted and is generally ex-
pected to be about half of
the specified data rate.
Tip No. 2 Digital vs. Mechanical PTZ
A key advantage of IP video is the ability to cover
large areas without the need for a mechanical
PTZ. Mechanical PTZ cameras will always have
a place in the surveillance world but do come with
some drawbacks. Some of those are the need
for an operator to control the camera for maxi-
mum effectiveness, failure rates on moving parts,
and not recording a scene when the camera is
directed at an alternate location. An IP camera
with a hemispheric lens or multiple megapixel
sensors can eliminate these concerns. When
surveying a potential video job, consider the use
of digital PTZ cameras to provide the end user
with a solution that will be more cost effective and
provide more coverage without the need for an
operator to control the camera.
Tip No. 3 Purpose-Built Recording Solutions
Selecting a recording solution for an IP based
video system can be overwhelming. While the
amount of storage is critical, it is not the only factor
that must be considered. Simply purchasing a
traditional server can sometimes create issues
in recording, latency, and overall system perfor-
mance. Most standard servers are designed for
office computing and communications which is
reading from a hard drive 90% of the time. A
purpose built video server is designed to write
to a series of drives over 90% of the time. The
speed for reading data from a hard drive versus
the speed of writing data to a hard drive are
significantly different. For this and other rea-
sons, a server to be used on an IP based video
system should be
specifically designed
and configured for
that use. If you
have any ques-
tions regarding
the best server
option for your ap-
plication, please do not
hesitate to contact your
TRI-ED sales professional.
Tip No. 4 Copper / Fiber Transmission Basics
Network cable utilizes four twisted pairs of solid
copper wire for structured cabling and stranded
wire for patch cables where frequent cable flexing
occurs. Fiber optic cable is typically used for
network backbones requiring high bandwidth
and links that exceed the distance limitations of
twisted pair cabling. Proper termination is essen-
tial for ANY cable to achieve its potential.
•
Category 5 Enhanced (Cat 5e) uses 24 gauge
wire and is suitable for transmission rates up
to 1 Gbps (1000 Mbps) with a link length up
to 100 meters (328’).
•
Category 6 (Cat 6) uses 23 gauge wire with
more twists per inch than Cat 5e. It is suitable
for transmission rates of 1 Gbps up to 100
meters and 10 Gigabit up to 55 meters (180’).
•
Augmented Category 6 (Cat 6a) uses 23
gauge wire with an internal filler that sepa
rates the pairs. It is suitable for 10 Gigabit
transmission rates up to 100 meters.
•
Multimode fiber is typically used as premise
cable. It can support data rates of 1 Gbps at
distances up to 2km. Support for 10GbE can
be achieved up to 300 meters (984’).
•
Single mode fiber is required for longer links.
Distances of 10-30km and beyond can be
achieved at Gigabit rates.