1/31/2015
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`PoE Applications: Today and Tomorrow | D-Link Resource Center
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`PoE Applications: Today and Tomorrow
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`Posted by Steven Olen on May 12, 2014 in Blogs, Popular
`
`Over the last several years, D-Link has
`experienced remarkable month-over-month sales
`growth within our family of Power over Ethernet
`(PoE) switches. While much of this success is
`attributable to the quality, durability and competitive
`pricing of our Business Switching products, it is
`also a reflection of the current state of the industry.
`PoE is exploding. Network managers are utilizing
`more and more PoE in their networks every day,
`because they recognize the simplicity and cost
`savings benefits that it brings. At the same time,
`device manufacturers are continually exploring and
`developing new PoE applications.
`
`PoE is an IEEE standard. This is important, because standards-based technologies support
`interoperability. Interoperability allows network designers to select the right networking
`equipment for their needs, regardless of manufacturer. Standards-based technologies also
`promote safety.
`
`Most IT professionals and security system integrators are already familiar with the two most
`prevalent uses for PoE technology – IP telephony and IP surveillance. They know that using
`PoE for IP phones and IP cameras eliminates the need for separate power and data cables,
`which simplifies installation, increases flexibility for device locations, and saves time and
`money.
`
`Yet PoE has many more uses beyond these two applications. Today there are many other
`applications that utilize PoE in ways you may not have considered.
`Wireless Access Points
`
`Most business-class wireless Access Points (APs) support PoE on their WAN interface—
`the uplink to the wired portion of the network. Powering an AP with PoE offers the flexibility
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`SONY EXHIBIT 1020
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`IP Camera Features
`
`Get yer poster! Get
`yer poster here!
`
`PoE Applications:
`Today and Tomorrow
`
`DAP-2695 Wireless
`AC1750 Simultaneous
`Dual-Band PoE
`Access Point Video
`Datasheet
`
`DCS-2136L Wireless
`AC Day/Night Camera
`with Color Night Vision
`Video Datasheet
`
`1/31/2015
`PoE Applications: Today and Tomorrow | D-Link Resource Center
`to be mounted on walls, ceilings and other hard-to-reach strategic locations. And if an AP
`needs to be repositioned, it’s quite easy to do so, because only the Ethernet cable needs to
`be moved.
`IP Clocks
`
`How many times have you visited a school or business
`building and noticed every wall clock keeping slightly
`different time? This problem is solved with IP clocks.
`They require no external AC power, no batteries and
`they remain synchronized to a centralized time server.
`They can be powered by the same PoE switch used
`for other applications in the network. For these
`reasons, they’re ideal for schools, office buildings and
`government facilities.
`Door Locks and Badge/RFID Readers
`
`Network-powered door locks, badge readers and RFID readers are another common-sense
`PoE application. For security-conscious businesses and schools that are already managing
`IP Surveillance systems, it’s not a stretch to see the value that building access control
`offers, while also being powered and controlled by the same network.
`Ethernet Repeaters
`
`Ethernet is designed to reach 100 meters (328 ft.) over UTP cable. For applications that
`require longer spans, some manufacturers offer PoE-powered Ethernet repeaters. They’re
`powered by PoE from an Ethernet switch up to 100m away, and can extend the Ethernet
`signal an additional 100 meters. In some cases, they can also provide power to an end
`device at the far end of the Ethernet span.
`PoE Splitters
`
`PoE splitters are installed at the end of an
`Ethernet link. They convert PoE voltage
`(about 48VDC) to a lower voltage, typically 5
`VDC or 12 VDC. At the same time, the
`Ethernet signal is transparently passed
`through the splitter to the end device.
`Splitters allow PoE switches to power non-
`PoE cameras and other devices that instead
`need lower voltages to operate.
`Intercoms, Pagers and Public Address (PA) Systems
`
`Analog PA systems with long speaker runs from a large central amplifier are largely
`outdated and antiquated. Today’s modern systems use small PoE powered amplifiers
`strategically placed wherever there may be a network drop using the existing Ethernet
`network. Software running on a PC or server manages the system and provides digital voice
`quality sound wherever it’s needed. The system can be used to provide emergency
`notification to an entire campus, or specific messages to each room.
`Digital Signage
`
`Digital signs, interactive displays and video kiosks have become an increasingly popular
`way to deliver compelling and creative media to any school campus, store, bank,
`
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`1/31/2015
`PoE Applications: Today and Tomorrow | D-Link Resource Center
`manufacturing floor or hospital—engaging customers, students and employees in a whole
`new way. PoE easily and cost effectively powers many of these popular communications
`devices, addressing concerns of both physical concealment and AC proximity for power
`bricks.
`Environmental/Industrial Sensors
`
`Frequently, businesses use intelligent online PoE sensors to measure environmental factors
`in mission-critical locations, such as warehouses, data centers, computer and server
`rooms, equipment rooms and more. These sensors provide important measurements for
`temperature, humidity, atmospheric pressure, power failure, airflow and the presence of
`water. Furthermore, they can automatically generate alerts via email or SNMP traps, so any
`problems can be resolved quickly, before they escalate.
`New and Future Applications
`
`Not surprisingly, there are plenty of new PoE applications on the horizon. I really like the
`potential of PoE powered LED lighting fixtures, which are easier to measure, monitor and
`control than traditional lighting fixtures. Because each LED fixture can be an end point on a
`network, it can be controlled separately, or dimmed automatically with proximity sensors that
`increase light when someone enters the space. And because PoE is typically considered as
`“low voltage” wiring, some of the permitting and installation costs associated with traditional
`high voltage wiring can be avoided.
`
`The IEEE is currently in Task Force phase working on a next generation PoE standard –
`802.3bt. This new standard will utilize all four pairs in the UTP cable and likely double (or
`more) the power delivered to a PD beyond the 25.5W maximum permitted by the 802.3at
`standard.
`
`This ability to deliver higher power to end devices will further expand the list of PoE
`applications over the years to come. Point of sale (credit card readers, printers), office
`productivity (thin clients, laptops), and higher end IP cameras (PTZ motors,
`heaters/blowers) are just a few.
`
`Here at D-Link, we’re excited to be part of this industry. As the standards evolve, so will our
`products. We are committed to our customers, and we’re focused on helping them save
`money with the value and utility that our products bring. Lowering installation costs by
`delivering power and data over the same link is just one way we do that.
`
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