power over ethernet

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Power Over Ethernet

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By: lnsguy54 (31 month(s) ago)

what a great presentation on PoE.

Presentation Transcript

POWER OVER ETHERNET : 

POWER OVER ETHERNET Sreelal Nellary, RCDDRegional Sales Manager Panduit Int’l Corp INDIA

AGENDA : 

AGENDA Introduction Power over Ethernet Advantages How PoE Works Deploying PoE Future Developments

INTRODUCTION : 

INTRODUCTION Q: What is Power over Ethernet (PoE)? A: It is the technology to send 48 volts DC power along with Ethernet data on 4 pair Unshielded Twisted Pair (UTP) or Shielded Twisted Pair (STP) cable.

INTRODUCTION : 

INTRODUCTION Allows reliable DC power as well as data over existing LAN cabling, without modifying existing Ethernet infrastructure Modeled after technology used by telecom industry to power traditional phones First developed to provide lifeline quality power for IP telephony Later expanded to broad range of devices

Why is PoE Interesting? : 

Why is PoE Interesting? Implications of this technology The RJ-45 connector has become the first universal worldwide power connector ! No need for a power “brick” at each device Flexibility in the placement of endpoint devices Liberation from a/c outlets

THE STANDARD: IEEE 802.3af : 

Approved on 12 June 2003 Supports familiar technologies: the ubiquitous RJ-45 plug and outlet 110 punch down Ethernet Category 5 and better (10/100/1000 BaseT) See http://www.ieee802.org/3/af/ “Data Terminal Equipment (DTE) Power Via Media Dependent Interface (MDI)” THE STANDARD: IEEE 802.3af

PoE ADVANTAGES : 

Lower Costs Eliminate the need to run A/C power wires Utilize existing IT infrastructure investments Ethernet cabling is everywhere, why not use it? More Flexible Locate device where performance is optimum Not constrained by the location of the AC outlet Centralize vs Localize Power Source Allow use of a centralized UPS to guarantee power to the appliance even during mains power failure PoE ADVANTAGES

PoE ADVANTAGES : 

Safer No mains voltage anywhere Manageability PoE devices that are Simple Network Management Protocol (SNMP) manageable can be remotely monitored and controlled Efficiently manage or troubleshoot power consumption and/or failures PoE ADVANTAGES

EXAMPLES of PoE Applications : 

Current VoIP Phones Wireless Access Points IP Cameras Lighting Controllers Clocks Future Access Control Pan-Tilt-Zoom Cameras Industrial Devices Smoke, Heat Sensors POS Terminals Laptops, Printers, etc… EXAMPLES of PoE Applications

HOW PoE WORKS : 

Two Basic Components: Power Sourcing Equipment (PSE): a device that supplies PoE power Located in Telecom Room or similar space Example: Power Patch Panel, Power Hub/Switch Powered Device (PD): a device that receives and utilizes PoE type power Located in the user area Example: VoIP Phones, Wireless AP, IP Cameras HOW PoE WORKS

HOW PoE WORKS : 

HOW PoE WORKS How is power supplied? Via Spare Pairs (Pins 4-5 and 7-8) Via Data Pairs (Pins 3-6 and 1-2)

HOW PoE WORKS : 

IP Camera 7-10 watts (15-25 watts for PTZ) VoIP Phone 3-7 watts Wireless Access Point 8-12 watts HOW PoE WORKS How much power is available? 48V DC Maximum of 350mA sent to PD Maximum Distance is 100m ~13 Watts maximum power available (37V x 350mA = 12.95W)

HOW PoE WORKS : 

HOW PoE WORKS How much power is required?

HOW PoE WORKS : 

PSE Power Sourcing Equipment Need Power? Yes, Thanks. OK, Here you go. PDPower Device What if I plug in a non-PoE device? Upon connection of any device, PSE “discovers” if device is PD or not Ensures non-PoE compliant equipment is not given power HOW PoE WORKS

DEPLOYING PoE : 

DEPLOYING PoE END-SPAN MID-SPAN Types of PSE

DEPLOYING PoE : 

DEPLOYING PoE Some examples of PSE’s End-Span Mid-Span

DEPLOYING PoE : 

DEPLOYING PoE Types of Mid-Span Power patch panel vs Power hub

DEPLOYING PoE : 

DEPLOYING PoE End-Span vs Mid-Span Power switch vs Power patch panel

DEPLOYING PoE : 

DEPLOYING PoE Some other considerations? AC vs DC power supply UPS capacity Air Conditioning Port prioritization Autosensing capabilities Interoperability – IEEE Standard vs Non-Standard

FUTURE DEVELOPMENTS : 

FUTURE DEVELOPMENTS PoE PLUS Study Group formed in Nov 2004 Objectives To provide more power (at least 30 watts) to power more products in existing PoE markets Backward compatible with 802.3af Gigabit Ethernet (GigE) for midspans 10Gigabit Ethernet (10GigE) for midspans and endspans

FUTURE DEVELOPMENTS : 

FUTURE DEVELOPMENTS PoE PLUS To power more products in existing PoE markets To benefit more markets with PoE Support mission critical applications by adding management requirements

FUTURE DEVELOPMENTS : 

FUTURE DEVELOPMENTS Looking ahead By 2008, Potential <30W-40W market is expected to be ~80 million units PoE Plus should double or triple the PoE market Current 802.3af applications evolve to require more power IP Phones -> Video Phones Current IP phones: 802.3af (<12.95W) Video phones: 15W – 40W Access points -> 802.11n AP with b radio: 802.3af (<7W) AP with a+g radios: 802.3af (>7W, <12.95W) 802.11n: ~20W Network Camera -> PTZ Network Camera Typical Zoom Camera: 802.3af (<12.95W) Pan/Tilt/Zoom Camera: 15W – 40W

FUTURE DEVELOPMENTS : 

FUTURE DEVELOPMENTS Broad Set(s) of Applications

IN SUMMARY : 

IN SUMMARY PoE is here to stay and only just making an impact There is a need to power more products in the existing PoE markets PoE can save substantial costs but more importantly, opens up new markets and sources of revenue for many of us The point and method of power injection is likely the most important decision

Thank You ! : 

Thank You !