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Power Over Ethernet (PoE) Technical Overview
Technical Report · January 2019
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Power Over Ethernet (PoE)
Technical Overview
January 9, 2019
Lester S. Shen, Ph.D.
CENTER FOR ENERGY AND ENVIRONMENT
This project is supported in part by:
A grant from the U.S. Department of Energy’s Office of Energy
Efficiency and Renewable Energy under the Award Number
EE0008191.
A grant from the Minnesota Department of Commerce, Division of
Energy Resources through the Conservation Applied Research and
Development (CARD) program.
Power Over Ethernet (PoE) Technical Overview
Contents
Power Over Ethernet (PoE) Technical Overview ........................................................................................................ 1
PoE basics ...................................................................................................................................................................... 1
Ethernet cables .............................................................................................................................................................. 2
PoE Standards............................................................................................................................................................... 2
LANs and Low Voltage DC ........................................................................................................................................ 4
Current State of the Art ............................................................................................................................................... 4
Appendix A. PoE Equipment Manufacturers ............................................................................................................ 12
UPoE Network Switches ........................................................................................................................................... 12
LED Lighting .............................................................................................................................................................. 12
HVAC Controllers ..................................................................................................................................................... 13
Zero Clients/Thin Clients/Desktop Computers/Displays ................................................................................. 13
Window Shades and Controls.................................................................................................................................. 14
Ceiling Fans ................................................................................................................................................................ 14
People Counting ......................................................................................................................................................... 14
Access Control ............................................................................................................................................................ 15
Biometric Access Control .......................................................................................................................................... 15
Temperature Sensors ................................................................................................................................................. 15
Sensor Hubs ................................................................................................................................................................ 16
Clocks ........................................................................................................................................................................... 16
Cameras ....................................................................................................................................................................... 16
Speakers/Paging/Intercomms ................................................................................................................................ 17
Power Over Ethernet (PoE) Technical Overview
Power Over Ethernet (PoE) Technical Overview
POE BASICS
Power over Ethernet (PoE) is a way to provide low voltage direct current (DC) electricity to
power devices connected to the local area network (LAN) through Ethernet cables. When
discussing PoE, the discussion needs to start with the on-site data center and the LAN. The onsite data center is the hub of the information network of the space, with all workstations, office
equipment (printers, copiers, and fax machines), wi-fi access points, and voice over Internet
Protocol (VoIP) phones connected to it and each other through the LAN. Figure 1 shows how
the basic components of small embedded data centers (SEDCs) are connected and powered.
Figure 1. Flow of Electricity in SEDCs to PoE Devices
With regard to PoE, the important devices in the SEDC are the network switches which provide
the direct connection to the IT and telecommunications equipment distributed throughout the
office. Switches that can support PoE convert the AC power provided to them to low-voltage
DC power, following the NEC class 2 standard of 48V DC. Both data and power are provided
through the Ethernet cables, running from the ports of the network switches to the PoE devices
around the office. Network switches can be described as the power sourcing equipment (PSE)
and the PoE devices like VoIP phones and Wi-Fi access points are described as the powered
1
Power Over Ethernet (PoE) Technical Overview
devices (PD). For non-PoE switches, a midspan power supply known as a PoE power injector
can be used to serve as the PSE. These are connected to an external power supply (AC line
voltage). PoE splitters are also available which split the data and power from PoE cabling and
can be used to power non-PoE devices that don’t have access to AC outlets. PoE injectors and
splitters are inexpensive alternatives to upgrade legacy equipment. However, when the PoE
devices are connected by centrally distributed cabling from the data center, they will typically
be backed by the UPS.
ETHERNET CABLES
The cables that physically connect the network switch to the devices on the LAN follow
standards set by the Telecommunications Industry Association (TIA) based on performance
level regarding signal bandwidth, attenuation and crosstalk and defined by Category. Category
cable, also known as Cat cable, are unshielded twisted pair (UTP) cables and for Ethernet
applications, Cat cable with eight wires arranged as four twisted pairs are used. Depending on
data transmission rate, two of the twisted pairs are typically dedicated to data transmission
with the two remaining pairs as spares. To power PoE devices, the two spare twisted pairs are
used to conduct low-voltage DC to the PDs; although when PDs are powered with higher
wattages, all four twisted pairs are used for PoE. Cat5e cables can be used for 10Base-T,
100Base-TX (Fast Ethernet), and 1000Base-T (Gigabit Ethernet) networks while Cat6a cables
would be used for the higher data transmission rates of 1000Base-T (Gigabit Ethernet) and
10GBase-T (10-Gigabit Ethernet) networks. For PoE, these cables are recommended for their
ability to deliver power without generating excessive heat. The maximum length recommended
for PoE is 100m (328’); otherwise, a PoE extender is recommended for longer runs.
POE STANDARDS
PoE was launched in 2000, PoE+ in 2008, and UPoE in 2011. Over the years, IEEE has ratified
standards for each of these three types of PoE. A fourth standard, Higher-power PoE, is
currently under consideration. Each standard defines the maximum power available from the
PSE to network-enabled devices. Table 1 allows comparison of the four different standards.
Table 1. Comparison of PoE Standards
PoE
PoE+
UPoE,
PoE++, or 4P
PoE
Higher-power
PoE
IEEE Standard
version
802.3af
(802.3at Type 1)
802.3at Type 2
802.3bt Type 3
802.3bt Type 4
Ratified
2003
2009
2017
pending
Maximum
power
from PSE
15.4W
30 W
60 W
100 W
2
Power Over Ethernet (PoE) Technical Overview
Power available
at PD
12.95 W
25.50 W
51 W
71 W
Voltage range
(at PSE)
44.0–57.0 V
50.0–57.0 V
50.0–57.0 V
52.0–57.0 V
Voltage range
(at PSE)
37.0–57.0 V
42.5–57.0 V
42.5–57.0 V
42.1–57.0 V
Twisted pairs
used
2
2
4
4
Supported
cabling
Cat3 and Cat5
Cat5
Minimum Cat5e
Recommended
Cat6
When the PD is connected to the PSE, it presents a load to the cable and draws a fixed level of
power. PoE and PoE+ are the typical types of PoE network switches currently found in SEDCs.
Typical PDs for PoE+ include VoIP telephones, access points, security cameras, remote
computer terminals/thin clients, and HVAC controllers. IEEE has defined nine PD power
classifications. Table 2 shows these classifications.
Table 2. PD Power Classifications
Class
PD Power
Minimum PSE
Power
PoE Type
0
0.44 - 12.95 W
15.4 W
PoE
1
0.44 - 3.84 W
4W
PoE
VoIP phones
2
3.84 - 6.49 W
7W
PoE
VoIP cameras,
Zero/thin clients
3
6.49 - 12.95 W
15.4 W
PoE
Wireless access
points,
sensors/meters
Biometric sensors,
tilt/pan/zoom
cameras, LCD
displays, HVAC
controllers
4
25.5 W
30 W
PoE+
5
40 W
45 W
UPoE
6
51 W
60 W
3
UPoE
Example PDs
LED lighting, allin-one
computers/thin
clients, video
conferencing
Power Over Ethernet (PoE) Technical Overview
equipment, smart
building devices
7
62 W
75 W
Higher Power PoE
8
71.3 W
90-100 W
Higher Power PoE
Laptops, TVs,
LED bay lighting
LANS AND LOW VOLTAGE DC
Since PoE is part of the LAN, its operation and management falls under the auspices of IT
services. Typically, low voltage electrical contractors work with the IT staff to setup the network
infrastructure by running Ethernet cables from the SEDCs to the connected devices throughout
the space. As opposed to line voltage wiring, conduit is normally not required for Ethernet
cable. This permits flexibility in managing the network. Once the network is initially setup, IT
staff maintain the network, connecting and disconnecting networked equipment as needed and
pulling additional cable as required. As they would with other IT services, IT staff will oversee
and maintain the data and power that is transmitted through each port of the network switches.
They perform operations on the network using system dashboards that allow them to define the
specific settings for each networked devices and schedule services. For instance, IT staff
manages the VoIP phone systems and networked office equipment. They even have energy
management responsibilities since they can implement desktop computer power management
(CPM) remotely through the network to each connected workstation and monitor. As more
building systems become networked, IT and facilities staffs will need to become more and more
coordinated.
CURRENT STATE OF THE ART
In 2011 the variety of devices that could be powered by PoE was greatly increased when Cisco
Systems introduced Universal Power over Ethernet (UPOE), providing 60 W of power per port.
A benefit from having both data and power provided by the Ethernet cable, sensors could also
be incorporated with the powered devices. The advent of UPoE brought the introduction of PoE
LED fixtures with occupancy and photometric sensors. Lighting control and management could
be performed on a fixture by fixture basis as each lamp was powered by its on connected port
on the network. The higher power provided by the UPoE PSE increased the variety and
combination of low-voltage PDs that could be added to the network and integrated into the
system, such as controllers, actuators, relays, fans, and motors.
Along with researching PoE devices and systems currently available on the market, a Request
for Information (RFI) was sent out to manufacturers and trade channels to assess the energy
efficiency opportunities that are provided by PoE. The RFI is provided as Appendix A of this
document. The following discussion summarizes the results of the research and RFI.
Network Switches - PoE and PoE+ network switches are widely available on the market today
and commonly used in network closets and embedded data centers for IT and
4
Power Over Ethernet (PoE) Technical Overview
telecommunications practices in businesses. More recently UPoE switches have been introduced
to the market and are becoming more widely available; UPoE switches are now offered by
manufacturers such as Cisco, Versa Technology, Netgear, among others. They range from 8 to
24 and 48 port switches that can be rack mounted and deployed in SEDCs. As more UPoEcompatible low voltage devices are adopted (with power loads > 30W), the demand for these
switches will increase.
Cisco offers an 8 port UPoE switch that is plenum-rated and can be deployed in the ceiling of
the space where the PDs such as lighting fixtures are located. This allows for the PoE Switch to
be removed from a centralized SEDC and placed locally in distributed zones of PoE devices.
Figure 3. Cisco Catalyst CDB-8U Switch
Panduit has identified the advantages and disadvantages of both centralized and distributed
PoE switch zone cabling.1
Table 3. Centralized PoE Switch Zone Cabling Advantages and Disadvantages2
Centralized Advantages
Centralized Disadvantages
Uses existing power infrastructure
Requires more cabling
Centralizes active equipment
Distance limitations from data closet to 100 m
or less
Easier to perform maintenance on equipment
in data closet
Larger PoE switches are generally less costeffective
1
Panduit whitepaper, PoE Lighting Benefits and Design Considerations, 2015.
https://www.panduit.com/content/dam/panduit/en/support/white-pages/PanduitWhitepaperPoELighting.pdf
2
Ibid.
5
Power Over Ethernet (PoE) Technical Overview
Table 4. Distributed PoE Switch Zone Cabling Advantages and Disadvantages3
Distributed Advantages
Distributed Disadvantages
Required less cabling
More difficult to perform maintenance on
equipment in ceiling box/zone enclosure
Distance is less of a limitation
Decentralizes active equipment
Smaller PoE switches are generally more costeffective
New power infrastructure needs to be run
into the ceiling
In addition to the higher powered network switches, PoE injectors are available to upgrade
legacy switches to be compatible with the higher PoE standards. These can be installed in the
SEDC with the legacy network switches or anywhere in the cable run between the switch and
the PD where an outlet is also accessible. Switch manufacturers like Cisco, HP, Microsemi,
Ubiquiti, and Belden also manufacture PoE injectors. PoE splitters provide the opportunity to
power low voltage DC devices using PoE cables and the higher PoE standards increase the
number of DC devices that can be powered. Figure 2 shows examples of a PoE injector and
splitter.
Figure 2. PoE Injector and Splitter
a.
3
PoE Injector
b.
Ibid.
6
PoE Splitter
Power Over Ethernet (PoE) Technical Overview
Lighting - The combination of the UPoE standard and the ability of many LED light lamps to be
powered by 60W low-voltage DC has led to the increased interest in PoE in commercial
buildings. Lighting manufacturers offer PoE LED fixtures that include 2x2 and 2x4 troffers, 4’
linear lights, downlights, and pendant lights. These are often the same fixture frames that are
available as the standard line voltage LED models. These include lighting manufacturers such
as Philips, Cree, GENISYS, HE Williams, Eaton, Hubbell, MHT Lighting, and others. As the
power in PoE systems increases to 100W, more and more of the LED lamp catalog will become
available to PoE including high bay and exterior flood lights.
PoE lighting systems can fall into one of two categories: directly-attached architectures and
node-attached architectures.4 In directly-attached architectures, the PoE lighting units, switches,
and other accessories are each attached to their on PoE port on the switch. For instance, an eight
port PoE switch would accommodate seven PoE lights and one wall switch for the directlyattached architecture. Philips and Cree systems are examples of this architecture. Occupancy
and photometric sensors are integrated into the lighting unit. The node-centric architecture has
an intermediary node that connects the PoE port to the lights and other accessories. GENISYS
Intellidrive5, NuLEDs SPICEbox6, and Igor Nexos7 are examples of systems that utilize this
architecture. In this architecture, the node can connect to multiple devices such as luminaires,
sensors, controls, and other accessories. This also allows luminaires to be daisy chained and in
some cases, nodes can even be daisy chained. The node approach can allow some system
customization since the node can also be wired to power or control other devices such as
motors, actuators, and relays. NuLEDs for example have used their node to power window
actuators and ceiling fans in a warehouse.8 Their SPICEbox is capable of powering and
controlling all the ceiling fan models available from Big Ass Fans.9 For both architectures, the
lighting systems are controlled using proprietary software installed on a server within the LAN
or by a cloud-based platform. The software may also share information and operate with other
systems using APIs and BACnet. Figure 3 shows schematics comparing the two lighting system
architectures.
4
Ibid.
https://www.genisyslighting.com/intellidrive.html
6
https://www.nuleds.com/spicebox/
7
https://www.igor-tech.com/news-and-insights/news/igor-launches-nexos
8
https://www.nuleds.com/the-next-wave-nuleds-aims-to-make-buildings-smarter-and-seamlesslyconnected-with-its-poe-lighting-systems/
9
https://www.youtube.com/watch?v=qVGStu5LeUY
5
7
Power Over Ethernet (PoE) Technical Overview
Figure 3. PoE Lighting System Architectures10
a.
b.
Directly-attached architecture example: Cree 2x2 troffer
c.
10
Directly-attached architecture
Directly-attached architecture
Panduit, op. cit.
8
Power Over Ethernet (PoE) Technical Overview
d. Node-centric architecture example: GENISYS Intellidrive
HVAC Control - Heating, ventilation, and air conditioning (HVAC) is an important building
system that determines the overall comfort in a building and represents a significant proportion
of a building's energy use. Both Delta Controls11 and Distech Controls12 offer PoE HVAC
controllers that bring IP-connectivity and power through a single Ethernet cable. In some cases,
these controllers can offer isolated HVAC equipment to be integrated into a BAS or EMIS where
previously only thermostatic control was employed.
Computer Workstations - PoE computer equipment is also commercially available. 10ZiG
Technology13 offers a range of PoE zero and thin clients while ThinLabs14 offer lines of PoE thin
clients and all-in-one single and dual monitor computers. The power loads of the PoE zero and
thin clients are less than 12 W with 10ZiG claiming an average power consumption of 3.4 W for
their zero and thin clients. These devices can be run on PoE switches. The desktop computers
offered by Thinlabs are all-in-one (AiO) computers which means that they also include either a
single or dual monitors (supporting 19”, 22”, or 24” monitors. The single monitor AiO desktop
computer can be powered by either PoE+ (<30 W) or UPoE (<60W) depending on the monitor
size. The dual monitor AiO computer should be powered by a UPoE switch (<60W).
11
https://www.deltacontrols.com/products/hvac-controls/ethernet-poe/power-over-ethernet-controllersdxc-poe
12
http://www.distech-controls.com/en/us/products/eclypse/connected-controller-series/relatedproducts/connected-vav-controller/
13
https://www.10zig.com/
14
https://thinlabs.com/
9
Power Over Ethernet (PoE) Technical Overview
Figure 4. PoE Workstations
c.
10Zig Thin Client
d. Thinlabs All-in-One Quad Core Computer
Low Voltage DC Devices - With the use of PoE splitters or through a node-centric architecture,
the low voltage DC current provided by PoE can be used to power any low voltage DC device
that falls within the power available from the particular PoE network port it is connected to (up
to 100 W with the new PoE standard). Many electrical appliances operate internally on DC
power. These can be easily converted to DC power by replacing the AC-DC transformer (e.g.
wall wart) with a direct DC connection. Examples include laptops, cell phones, battery chargers,
AV equipment, or any device that uses a USB cable for power. A growing number of appliances
are operated with variable speed-capable DC motors (fans, pumps, compressors, and traction
systems). Relays operated with low voltage DC can be used as a switch to control AC outlets
and power strips. DC appliances are also available from suppliers to the off-grid and
recreational vehicle markets. Some of this equipment may be compatible with the low voltage
DC power offered by PoE. Extending PoE to these loads would require some customization
since the equipment is not off-the-shelf PoE-ready but the potential for greater DC-power
adoption in commercial and residential settings is growing. The use of PoE switches allows a
level of control and management for these devices and the use of low voltage DC can offer
efficiency and installation benefits.
Cisco Digital Building Solution - The Cisco Digital Building Solution15 have recruited a partner
community that supports PoE technologies that can be deployed in commercial buildings. The
digital building is defined by networking, lighting, building automation, enablers (the
components and infrastructure needed to merge separate building networks into one IP
platform), and necessary software applications. These Digital Building Solution partners
include:
●
15
Cree
●
Intelligent Buildings
●
Platformatics
https://www.cisco.com/c/en/us/solutions/workforce-experience/digital-building/index.html
10
Power Over Ethernet (PoE) Technical Overview
●
●
●
●
●
●
●
Delta Controls
DGLogik
Eaton
Ellipz Lighting
EllisDon
Igor
Innovative Lighting
●
●
●
●
●
●
●
Johnson Controls
Legrand
Microchip
Molex
NuLEDs
Orion Energy Systems
Philips Lighting
●
●
●
●
●
●
PointGrab
Rifiniti
The Siemon Company
Superior Essex
Vertiv
Wipro Lighting
Interoperability and Integration - Connectivity and the Internet of Things is still in it
developmental stages with manufacturers developing technologies and the promise of
intelligent buildings still on the horizon. Currently, the end use equipment is still somewhat
siloed. Most of the equipment manufacturers provide the ability of their equipment to
communicate via APIs and/or BACnet. However, the ability to communicate with other devices
and systems is reliant on the end-user community to customize this software to meet their
individual needs and provide the functionality and interoperability that they desire.
Looking Forward - PoE very much represents a source of emerging technologies and systems.
New PoE standards are allowing more and more types of equipment and appliances to be
introduced to the market. Storage batteries and DC microgrids could also promote the use of
DC in buildings, leading to even more technological advancement as well as creating greater
demand for these systems as communities look to increase their resiliency. We can expect this
market to continually bring more offerings and advancements that include access control,
sensors, cameras, alarms, speakers, and displays. Appendix A provides a representative list of
current PoE equipment manufacturers.
11
Power Over Ethernet (PoE) Technical Overview
Appendix A. PoE Equipment Manufacturers
UPOE NETWORK SWITCHES
Cisco
https://www.cisco.com/c/en/us/solutions/enterpris
e-networks/upoe/index.html
L-com
http://www.l-com.com/power-over-ethernet-8-portgigabit-60w-ultra-poe-managed-injector-hub-400w
Leviton
https://www.leviton.com/en/products/commercial/
networking/copper-systems/power-over-ethernet
Linear Technology
http://www.linear.com/products/power-overethernet_(poe)_interface_controllers
http://www.linear.com/products/poe_powered_dev
ice_(pd)
Microsemi
https://www.microsemi.com/
NetGear
https://www.netgear.com/business/products/switc
hes/managed/m6100.aspx#tab-features
NuLEDS
http://www.nuleds.com/
NVT Phybridge
http://www.nvtphybridge.com/portfolio-item/flex/
Planet Technology
https://planetechusa.com/?s=upoe
TRENDnet
http://www.trendnet.com/products/proddetail?pro
d=165_TI-UPG62
Versatek
https://www.versatek.com/product/vx-gpu2626-l224-port-managed-gbe-upoe-switch/
Vivotek
http://www.vivotek.com/
LED LIGHTING
Acuity
https://www.acuitybrands.com/products/lighting/f
eatured-technology/low-voltage
Cree
http://www2.cree.com/smartcast-landing-page
Eaton
http://www.cooperindustries.com/content/public/e
n/lighting.html?file=
Ellipz Lighting
https://www.ellipzlighting.com/
12
Power Over Ethernet (PoE) Technical Overview
HE Williams
https://www.hew.com/search?q=poe
Hubbell
https://www.hubbell.com/hubbelllightingci/en/sear
ch/?text=poe
Igor
https://www.igor-tech.com/technology/intelligentlighting-control
Innovative Lighting
http://www.innovativelight.com/commercialindustrial-led-lighting/poe-led-lighting/
JTH Lighting Alliance
https://www.jthlighting.com/
LumenCache
http://lumencache.lighting/
Lunera
https://www.lunera.com/
MHT Lighting
https://mhtlighting.com/wdpr/poe-lighting-systeminspextor/
Molex
http://www.molex.com/molex/news/display_news.j
sp?channel=New&channelId=-8&oid=2036
Ubiquiti
https://store.ubnt.com/products/unifi-led-panel
NuLEDs
http://www.nuleds.com/
Orion Lighting
http://www.orionlighting.com/
Philips
http://www.usa.lighting.philips.com/systems/conne
cted-lighting-for-offices
Platformatics
https://www.platformatics.com/
HVAC CONTROLLERS
Delta Controls
https://www.deltacontrols.com/products/hvaccontrols/ethernet-poe
Distech
http://www.distechcontrols.com/en/me/products/eclypse/connectedcontroller-series/related-products/connected-vavcontroller/
ZERO CLIENTS/THIN CLIENTS/DESKTOP COMPUTERS/DISPLAYS
Thinlabs
https://thinlabs.com/products/poe-computers-thin-
13
Power Over Ethernet (PoE) Technical Overview
clients
10ZiG
https://www.10zig.com/thin_clients/Citrix
AIS Pro
http://www.aispro.com/
WINDOW SHADES AND CONTROLS
Somfy
https://www.somfysystems.com/
Molex
https://www.molex.com/molex/products/group?ke
y=aeromotive174_mobile_electrification&channel=PR
ODUCTS
RollerTrol
https://rollertrol.com/actuator-for-vent-control-orwindow-opener
CEILING FANS
Haiku by Big Ass Fans
https://www.haikuhome.com/ceiling-fans
PEOPLE COUNTING
Axis
https://www.axis.com/dk/en/solutions-byapplication/people-counting
Axper
http://axper.com/people_counter/
Brickstream
http://www.brickstream.com/
CountBox
https://countbox.us/retail-sensors/
Density.io
http://density.io
Irisys
http://www.peoplecounting.co.uk/products/counter
s/thermal-counters
Ivani
https://www.ivani.com/
Optex
http://www.ot-inc.com/product_pages/vc1020.htm
Sensource
http://www.sensourceinc.com/PC-VID2.htm
Trafsys
http://www.trafsys.com/traf-sys-gazelle-peoplecounter/
Vcount
http://v-count.com/products/v-count-3d-alpha/
Vivotek
http://www.vivotek.com/sc8131/#views:view=jplistgrid-view
14
Power Over Ethernet (PoE) Technical Overview
ACCESS CONTROL
Assa Abloy
http://www.assaabloy.com/en/com/solutions/prod
ucts/
Borer
http://www.borer.co.uk
Cisco
http://www.cisco.com/c/en/us/products/physicalsecurity/physical-access-gateways/index.html
Genetec
https://www.genetec.com/Documents/EN/Products
/EN-Genetec-Corbin-Russwin-Access-800-IP1Specifications-Sheet.pdf
Hartmann Controls
http://www.hartmann-controls.com/
HID Global
https://www.hidglobal.com/products/controllers
Honeywell
https://www.honeywellaccess.com/documents/L_N
XS123D_D.pdf
Kintronics
https://kintronics.com/solutions/ip-door-accesscontrol/
BIOMETRIC ACCESS CONTROL
Allgovision
http://www.allgovision.com/face-recognition.php
Idteck
http://www.idteck.com/en/
FST Biometrics
http://fstbm.com/
Herta
http://www.hertasecurity.com/en/node/13
Suprema
https://www.supremainc.com/en/productcategories/access-control-and-time-attendance
Westinghouse
http://www.westinghousesecurity.com/locks-rteonpoe-124/
TEMPERATURE SENSORS
AKCP
http://www.akcp.com/products/sensorprobeseries/sensorprobe2/
Comet System
http://www.cometsystem.com/en/search.php?sw=p
oe
ControlbyWeb
http://www.controlbyweb.com/temperature/?gclid=
CNG6j8DEudICFZOIswodyLcJLQ
Sensormetrix
http://www.sensormetrix.co.uk/_f_91.php
15
Power Over Ethernet (PoE) Technical Overview
SENSOR HUBS
Avtech
http://avtech.com/Products/AVTECH_Environment
_Temperature_Monitor_Model_Compare.htm
relayr
https://relayr.io/gcp-kickstarter-sme/
SRO
http://www.server-rack-online.com/enviromuxmicro-trhp.html
CLOCKS
Valcom
http://www.valcom.com/clock2013/ip_clocks.htm
American Time
http://www.american-time.com/products-byfamily/ip-network-clocks/poe-power-over-ethernetnetwork-clocks
BRG Precision
http://www.brgprecision.com/products/synchroniz
ed_clocks/poeclocks.php
Inova Solutions
https://www.inovasolutions.com/networkclocks/products
Pyramid
https://www.pyramidtimesystems.com/Products/S
ynchronized_Wireless_Clocks/Power_Over_Ethernet
_Synchronized_Clocks/
Simplex Time
http://www.simplextime.com.au/product/digitalpoe-clocks
Spectracom
https://spectracom.com/sites/default/files/docume
nt-files/ip_poe_synchronized_clocks.pdf
Telecor
http://www.telecor.com/clocks_poe.php
Tyco/Simplex Grinnell
http://www.simplexgrinnellstore.com/timesolutions/wall-clocks/digital-wall-clocks/
VoIP Supply
http://www.voipsupply.com/paging/ip-clocks?
Wharton
https://www.wharton.co.uk/ip-clocks/poeclocks.htm
CAMERAS
Axis
https://www.axis.com/dk/en/products/networkcameras
Baumer
http://www.baumer.com/usen/products/identification-imageprocessing/industrial-cameras/tx-series/tx-seriespoe/
16
Power Over Ethernet (PoE) Technical Overview
Bosch
http://us.boschsecurity.com/en/products/ipcameras-product-selector_13#section_10164917899
Brickhouse
http://www.brickhousesecurity.com/category/vide
o+surveillance+security+cameras/business+surveilla
nce+cameras.do
FLIR
http://www.flir.com/security/content/?id=67507
Honeywell
https://www.honeywellvideo.com/products/videosystems/cameras/ip/index.html
Kintronics
https://kintronics.com/solutions/ip-camerasystems/
Panasonic
http://security.panasonic.com/products/category/n
etwork_camera/
Pelco
https://www.pelco.com/video-surveillance-camerasecurity-systems
Sony
http://us.professional.sony.com/pro/products/vide
osecurity
Tyco
https://www.tycois.com/solutions-by-need/protectmy-business/video-surveillance/video-cameras
Vivotek
http://www.vivotek.com/
SPEAKERS/PAGING/INTERCOMMS
BRG Precision
http://www.brgwireless.com/products/wireless_in
door_speakers/index.php
Chomkola
https://www.chomkola.com/ip-poe-pagingintercoms/
Cyberdata
https://www.cyberdata.net/collections/voip
Valcom
http://www.valcom.com/speaker_product/ip_speak
ers.htm
VoIP Supply
http://www.voipsupply.com/paging/speakers
17
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