Power over Ethernet Solution for IP Video Surveillance

Power over Ethernet Solution for IP Video Surveillance
Power over Ethernet solution
For IP Video Surveillance
Preface
There are two PoE standard have been ratified by IEEE organization. IEEE802.3af -2003 and
IEEE802.3at-2009. 802.3af standard offers the 15.4 Watt of DC power to powered device, Only 12.95
W is assured to be available at the powered device as some power dissipates in the cable. While the
802.3at standard also known as PoE+ or PoE plus, provides up to 25.5 Watt of power.
However, for powering IP PTZ cameras, much higher power is required. The most majority of IP PTZ
cameras are rated at 35 Watt or above 60 Watt. So, a 60 Watt PoE standard becomes available in the
market. 60 Watt PoE also called as Ultral PoE, UPoE, Hi-PoE. Unlike the 802.3af/802.3at standard,
the UPoE/Hi-PoE is not ratified, the most mainstream PoE network switches only support PoE and
PoE+.
When deploying the PoE technology to your IP surveillance system, please note that the furthest
transmission distance is up to 90 meters if using the standard cat5/cat6 Ethernet cable. To the
applications beyond this limit, it’s recommended to use optical fiber cables which can provide up
to kilometers transmission distance. Lastly, today almost all IP camera manufacturers produce
cameras with PoE, PoE+, UPoE/Hi-PoE. The PoE can provide easy to maintenance and cost-effective
cable layout solution by carrying power and data in the same network cable. It has become a
standardized technology which is almost mandatory for IP camera systems.
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IEEE802.3af & IEEE802.3at Standard
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How to choose a PoE switch?
Since using PoE technology is the best choice, what are factors should we consider when choosing
a PoE network switch? For selecting right PoE network switches based on two major factors: PoE
standard (802.3af or PoE+) & power requirements, bandwidth & ports requirements.
PoE standard & Power requirements
• PoE (802.3af) provides up to 15.4W per port with up to 12.9W available to the IP camera
• PoE+ (802.3at) provides up to 30W, with up to 25W available to the IP camera
• Hi-PoE/UPoE provides up to 60W, specifically work with IP PTZ cameras.
Most IP cameras are designed to accept Power over Ethernet with 802.3af standard. For high power
consumption network cameras such as PTZ network camera they utilizes PoE+ (802.3at) standard.
When choosing a PoE switch, the PoE standard must match each other.
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Ports & Bandwidth Requirements
You need to know the quantity of network cameras will be in the network. This determines how many
ports the switch will need. One port per camera, today there are 4 channel, 8 channel, 16 channel, 24
channel, 32 channel PoE switches available in the market.
Thereafter, you need to figure out what the average bandwidth required per camera. The bandwidth
requirement depend on many factors, primarily the resolution, the frame rate. Using this camera
bandwidth calculator, you can estimate the required network bandwidth for video streaming. After
knowing the average bandwidth required per camera, you can calculate the total bandwidth required
per switch.
Average bandwidth per camera x total number of cameras = total bandwidth
Adequate bandwidth for data transmission and resilience, security are key factors required to ensure
a successful surveillance network. Undoubtedly, the network is an important element in any network
surveillance installation, because it enables system function, not only transmitting video stream so
they can be viewed and stored, but also carrying power to the cameras via a Power over Ethernet
feature.
What's Midspans and PoE splitters
Midspans and splitters (also known as active splitters) are equipment that enable an existing network
to support Power over Ethernet.
The midspan, which adds power to an Ethernet cable, is placed between the network switch and the
powered devices. To ensure that data transfer is not affected, it is important to keep in mind that the
maximum distance between the source of the data (e.g., switch) and the network video products is
not more than 90m. This means that the midspan and active splitter(s) must be placed within the
distance of 90m.
A splitter is used to split the power and data in an Ethernet cable into two separate cables, which can
then be connected to a device that has no built-in support for PoE. Since PoE or PoE+ only supplies 48
V DC, another function of the splitter is to lower the voltage to the appropriate level for the device; for
example, DC12 V or DC5 V.
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Standard PoE Network Switches
Model
POE4100P
POE8101PF
POE1601PF
POE2401PF
Picture
PoE Standard
RJ45 Ports
SPF Ports
Total Bandwidth
MAC
Addressing
Status LEDs
Standards
PoE Power Rate
Pairs
RF Standard
Power Supply
Dimension
Installation
Warranty
Operating Temp.
Ingress Protection
IEEE802.3af (max. 15.4W)/at (max. 30W)
4x 10/100Mbps RJ45 Ethernet PoE 8x 10/100Mbps RJ45 Ethernet 16x 10/100Mbps Ethernet PoE 24x 10/100Mbps Ethernet PoE
Ports; 1x 10/100Mbps RJ45
PoE Ports; 1x Gigabit RJ45
Ports; 2x Gigabit RJ45
Ports; 2x Gigabit RJ45
2x 1000Mbps Fiber SFP ports 2x 1000Mbps Fiber SFP ports 2x 1000Mbps Fiber SFP ports
N/A
(Fiber, Combo mode)
(Fiber, Combo mode)
(Fiber, Combo mode)
1.6Gigabit bps
8.8Gigabit bps
8.8Gigabit bps
8.8Gigabit bps
1K entry MAC address with auto4K entry MAC address with
4K entry MAC address with
8K entry MAC address with
learning and auto-aging
auto-learning and auto-aging auto-learning and auto-aging auto-learning and auto-aging
48-bit MAC
Link, Activity, Speed, PoE Active, PoE Fault
IEEE 802.3i 10BASET; IEEE 802.3u 100BASETX; IEEE 802.3x Flow Control; IEEE 802.1af DTE Power via MDI
65W
130W
250W
400W
1/2+, 3/6- pairs (default)
CE mark, commercial, FCC Part 15 Class B, VCCI Class B EN 55022 (CISPR 22), Class B
AC/DC Adapter DC52V 1.25A
AC100-240V 50/60Hz, 130W AC100-240V 50/60Hz, 400W AC100-240V 50/60Hz, 400W
118 x 89x25mm
279×210×44mm
440×210×44mm
440×210×44mm
Wall-mount kit
Rack-mountable
Rack-mountable
Rack-mountable
12 months factory warranty
-20°C - 55°C (Celsius Degree)
N/A (indoor only)
Standard PoE Splitters
PD41001: 10/100M PoE Splitter/Adapter, Output DC12V, Compliant 802.3af standard, max. 15.4W,
1236 pairs
PD41001-at: 10/100M PoE Splitter/Adapter, Output DC12V, Compliant 802.3at standard, max. 30W,
4578 pairs
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60W PoE Network Switches
Model
POE4001P
POE4004P
POE4006P
Picture
PoE Standard
RJ45 Ports
SPF Ports
Total Bandwidth
MAC
Addressing
Status LEDs
Standards
PoE Power Rate
Pairs
RF Standard
Power Supply
Dimension
Installation
Warranty
Operating Temp.
Ingress Protection
IEEE802.3af (max. 15.4W)/at (max. 30W); 60W
12 ports support 60W PoE, 34 ports
1234 ports support 60W PoE, 5678 ports
are regular Ethernet ports, 5678 ports
are regular 10/100Mbps Ethernet Ports
support 15.4W (802.3af) PoE.
N/A
N/A
N/A
1.6Gigabit bps
1.6Gigabit bps
1.6Gigabit bps
1K entry MAC address with auto-learning and
1K entry MAC address with auto1K entry MAC address with autoauto-aging
learning and auto-aging
learning and auto-aging
48-bit MAC
Link, Activity, Speed, PoE Active, PoE Fault
IEEE 802.3i 10BASET; IEEE 802.3u 100BASETX; IEEE 802.3x Flow Control; IEEE 802.1af DTE Power via MDI
110W
250W
250W
1/2, 4/5+, 3/6, 7/8CE mark, commercial, FCC Part 15 Class B, VCCI Class B EN 55022 (CISPR 22), Class B
AC/DC Adapter DC 52V 2.15A
AC100-240V 50/60Hz, 250W
AC100-240V 50/60Hz, 250W
118 x 89x25mm
279×210×44mm
279×210×44mm
Wall-mount kit
Rack-mountable
Rack-mountable
12 months factory warranty
-20°C - 55°C (Celsius Degree)
N/A (indoor only)
1x 10/100Mbps PoE Port (up to 60W), 4x
10/100Mbps Ethernet RJ45 Ports
60W PoE Splitters
PD3401: 10/100M PoE Splitter/Adapter, Output DC12V, max. 60W, 1/2, 4/5+, 3/6, 7/8- pairs
PD3401G: 1Gigabit PoE Splitter/Adapter, Output DC12V, max. 60W, 1/2, 4/5+, 3/6, 7/8- pairs
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