Port Power Over
Aug 18
2011
2011
Port Power Over
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 Allied Telesis Inc At 6101g 10 Single Port Power Over Ethernet Injector  US $54.15
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History of USB Port Explained, USB Port simplifed
USB Port Explanation
Everyone that has used a PC or laptop will have used this ports without themselves knowing.
The history of the USB port goes back to the period of 1990s where several connection interface exist such as serial port, parallel port, ps2, etc. With so many interfaces, a typical user will need different cables for each separate connection.
USB(Universal Serial Bus) was created to standardize all the different interfaces, hence the word “universal”
With the standardization of different interface, the USB port has more tasks to complete – to increase their transfer rate between the host and devices connected to it.
USB started off on specification USB1.0 in 1994, followed by USB1.1, and finally USB2.0 in 2000
The various transfer speed of the specification is as follows
USB1.0 – 1.5Mbit/s
USB1.1 – 12Mbit/s
USB2.0 – 480Mbit/s
As of writing, USB3.0 Specification was in the midst of discussion and the transfer speed is rumored to be at 5000Mbit/s!!
The increase in transfer speed was mainly meant for transferring of data between devices. As USB hard disk expands in capacity, and users are demanding for better video quality, naturally, video file sizes are increased. Thus the birth of USB3.0
The first commercial product released for USB flash drives, commonly known as thumbdrive, in 2000. Back then, flash storage was at a measly 128mb. At time of writing, 2009, 1.5TB (1,500GB or 1,500,000MB) already exists!
If we were to transfer a single file of 5Gb on usb1.1 specs, on theory, we will need 3333s, which will take around 55min!! and 83s on a USB2.0 Specs.
Over the years, different companies develop different interface for USB devices as well, which somehow defeats the purpose of standardizing a common interface. However, the problem of different interface was not as serious as it was back in 1990s.
USB cable was able to carry power and to power up devices such as thumbdrive, webcams, external hard disk, usb speakers, etc. However, power is capped at 5v, 100mA.
USB cables suffer from a “useful” distance. Meaning, the maximum length of a usb cable is capped at 5m. Should the length be longer, the efficiency dropped and data may be corrupted.
For PCs with limited USB ports, a hub, typically with 4 additional USB ports, may be purchased. This will indirectly increase 3 more USB ports on your computer. However, take note that the bandwidth and power of each port on the USB hub will be reduced, as all its bandwidth and power are sourced from a USB port.
Common problems faced from using a USB hub, slower transfer rate and the inability to power up external 2.5” hard disk as they require more power as compared to a usb webcam or usb speaker.
That is all to wrap up for the topic and history for USB. I hope that the above computer guide will assist you in having a further understanding of USB history.
For more information about computers, do visit S-Mall Computer Article Section.
If you are purchasing computers in Singapore, do drop by our website http://www.s-mall.com.sg
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About the Author
Nick Lee is a consultant for a computer website at http://www.s-mall.com.sg and has assisted many on their technical issues.
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8 Port Power over Ethernet Swi $364.64 - EdgeConnect 8 port power over Ethernet switch- Automated setup when used in conjunction with EdgeMarc and EdgeView- In-line Ethernet power (802.3af) with automatic power device detection- In-line power for many legacy (non-802.3af) IP handsets- Per port |
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Edgewater Networks / 8 Port Power over Ethernet Switch / EC-800POE-01 $389.85 Edgewater Networks - 8 Port Power over Ethernet Switch - EC-800POE-01 |
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Motorola / Motorola 1 Port Power over Ethernet Injector / AP-PSBIAS-1P3-AFR $89.01 Motorola - Motorola 1 Port Power over Ethernet Injector - AP-PSBIAS-1P3-AFR |
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3Com Power Over Ethernet Single-Port MidSpan Solution 3CNJPSE $51.5 3Com Power Over Ethernet Single-Port MidSpan Solution 3CNJPSE |
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Motorola 1 Port Power over Ethernet Injector APPSBIAS1P3AFR $82.76 Motorola 1 Port Power over Ethernet Injector APPSBIAS1P3AFR |
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Motorola 1 Port Power over Ethernet Injector $73.99 1 Port Power over Ethernet Injector 1 lb Symbol AP-7131 Wireless Access Point AP-PSBIAS-1P3-AFR Motorola Motorola, Inc PoE Injector www.motorola.com/us |
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AXIS Power Over LAN Midspan -1 port $72.99 Specifications: Function: Deploying Power over LAN in conjunction with a central UPS distributes back-up power and ensures uninterrupted operation of network surveillance cameras during electrical power failures. Data rate: 10/100 Mbps Connectors: 1 shielded RJ-45 Data connector and 1 shielded RJ-45 output connector for the combined data and power, TIA/EIA 568 Category 5 Scalability: Multiple Midspans can be mounted in a wiring cabinet to support additional terminals, resulting in a simple, cost effective method for expanding the network, as requirements evolve Remote power feeding: Powers network video products up to 100m (328 ft) by utilizing existing Ethernet or fast Ethernet (category 5 unshielded or shielded twisted-pair cabling) for power transfer Pin assignment and polarity: 4/5 (RTN.), 7/8 (-V) Output power voltage: -48 V User port power: 15.4 W minimum Agg... |
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StarTech.com 8 Port 10/100 PSU Industrial Power over Ethernet Switch - All 8 Ports PoE - 8 Port - 8 x 10/100Base-TX - Power... $187.65 StarTech.com 8 Port 10/100 PSU Industrial Power over Ethernet Switch - All 8 Ports PoE - 8 Port - 8 x 10/100Base-TX - Power... |
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Motorola Single Port AF Power over Ethernet Injector $55.99 1 1 lb 1 x RJ-45 10/100Base-TX 1.20" Height x 2.36" Width x 5.71" Depth 10/100Base-TX 15.40 W 48 V DC Symbol AP-300 Access Ports Symbol AP-5131 Access Points This Single AF Port Power over Ethernet Injector provides the benefits of Power-over-Ethernet for individual Motorola access ports. Once the power injector is connected to your Ethernet switch, power and data are then transmitted to the access port via the Ethernet cable. The power injector supplies effective independent overload and short circuit protection per port. With the power injector, you can use your current LAN infrastructure to supply power directly to your access ports from a central location, delivering a cost-effective power solution for your small-site deployment. AP-PSBIAS-1P2-AFR Motorola Motorola, Inc PoE Injector RJ-45 10/100Base-TX Single Port AF Power over Ethernet Injector www.motorola.com/us |
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StarTech.com 8 Port 10/100 PSU Industrial Power over Ethernet Switch $350.27 IES8100POE 8PORT 10/100 POE PERPSWITCH POWER OVER ENET |
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USB3.0+Power over eSATA PCI-express Card PCIe SATA3.0 eSATAp combo port low profile bracket--Free Shipping $19.9 External USB3.0 and Power over eSATA port with internal USB3.0 port PCIe Card |
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Enterasys A4H124-48P Ethernet Switch - Manageable - Stack Port - 10/100/1000Base-T, 10/100Base-TX - Power Over Ethernet A4H1... $1804.38 Enterasys A4H124-48P Ethernet Switch - Manageable - Stack Port - 10/100/1000Base-T, 10/100Base-TX - Power Over Ethernet A4H1... |
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Cisco Catalyst WS-C2960CPD-8TT-L Ethernet Switch - 10 Port - 8, 2 x 10/100Base-TX - , 10/100/1000Base-T - Power Over Etherne... $531.98 Cisco Catalyst WS-C2960CPD-8TT-L Ethernet Switch - 10 Port - 8, 2 x 10/100Base-TX - , 10/100/1000Base-T - Power Over Etherne... |
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Zyxel ES1100-16P Ethernet Switch - 16 Port - 8, 8 x 10/100Base-TX - , 10/100Base-TX - Power Over Ethernet ES110016P $152.57 Zyxel ES1100-16P Ethernet Switch - 16 Port - 8, 8 x 10/100Base-TX - , 10/100Base-TX - Power Over Ethernet ES110016P |
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Alcatel OmniSwitch OS6250-P24 Ethernet Switch - 26 Port - 2 Slot - 24, 2 x 10/100Base-TX - , 10/100/1000Base-T - Power Over... $1063.75 Alcatel OmniSwitch OS6250-P24 Ethernet Switch - 26 Port - 2 Slot - 24, 2 x 10/100Base-TX - , 10/100/1000Base-T - Power Over... |
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Cisco Catalyst WS-C2960CPD-8PT-L Ethernet Switch - 10 Port - 8, 2 x 10/100/1000Base-T - , 10/100/1000Base-T - Power Over Eth... $631.48 Cisco Catalyst WS-C2960CPD-8PT-L Ethernet Switch - 10 Port - 8, 2 x 10/100/1000Base-T - , 10/100/1000Base-T - Power Over Eth... |
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HP Power Over Ethernet PoE Adapter Single-Port MidSpan Solution JD483B $46.85 HP Power Over Ethernet PoE Adapter Single-Port MidSpan Solution JD483B |
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EDGEWATER NETWORKS EDEC800POE01 8 Port Power over Ethernet Switch $567 EdgeConnect 8 port power over Ethernet switch Automated setup when used in conjunction with EdgeMarc and EdgeView Inline Ethernet power (802.3af) with automatic power device detection Inline power for many legacy (non802.3af) IP handsets Per port optional power sourcing Full wirespeed forwarding L2/L3/L4 traffic management 802.1Q VLAN support 802.1p based Quality of Service (QoS) with priority queuing Link aggregation (802.3ad) Broadcast multicast unknown unicast storm control Management/monitoring: SNMP RMON http Telnet SSH and DHCP LAN ports: 8port 10/100 mbps Ethernet auto negotiating full or half duplex backpressure flow control at halfduplex IEEE802.3x flow control at full duplex RJ45 Aux ports: 2 x 10/100/1000 mbps Ethernet combo ports auto negotiating Complies with IEEE802.32005 IEEE802.3af IEEE 802.1D IEEED802.1Q IEEE802.1X Tagged VLAN: up to 256 IEEE802.1Q based VLANs 5.6 gbps aggregated throughput with full wire speed forwarding Support IEEE 802.3af with maximum of 15.4W per port and a total of 70W for the switch Regulatory: CE Mark FCC Class A CISPR Class A EN 610042/3/4/5/6/8/11 UL/CUL (UL 609501 CSA 22.2 No. 609501) CB (IEC609501 EN609501)EDEC800POE01 |
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Power over Ethernet Injector - power injector $59.99 4XEM Power over Ethernet Injector - Power injector - 1 output connector(s) - for 4XEM EPOEMS12 12 Port MidSpan POE Switch IP Network Camera W45 |
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Pd-9501G/Ac - Microsemi Powerdsine Pd-9501G Single Port Power Over Ethernet $112.56 the Powerdsine 9501g is a Single Port, High-power Solution For Remote Powering of Current And Emerging High Power Applications. Generating a Maximum of 60w, The Pd-9501g Enables Remote Power For a New Range of Applications Including Pan-tilt-zoom (ptz) Cameras, Video-phones And Thinclients [PD9501GAC] UPC: 844117001105 UNSPC: 39121000 10.2L x 3.9W x 3.7H 1.5 LB |
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Transition Networks EmPowered Ethernet Single-port Power over Ethernet Injector $56.99 -48 V DC 0 to 90% Non-condensing Relative Humidity Operating 0 to 95% Non-condensing Relative Humidity Storage 1 1 x RJ-45 10/100Base-TX 1.38" Height x 4.61" Width x 2.36" Depth 10/100Base-TX 100 V AC to 240 V AC 100 to 110 V AC 110 V AC 220 V AC 300 mA 32°F (0°C) to 104°F (40°C) Operating 32°F (0°C) to 158°F (70°C) Storage 50 Hz 60 Hz 7.05 oz IEEE802.3af FCC Class B CE/EN60950 CE UL cUL Intelligent detection process to detect Power over Ethernet enabled terminals and protect legacy endpoints Furnishes easy and cost-effective installation with fewer cables and electrical outlets 1U height and 19" Rack mountable (MIL-L800i only) Provides one central secure location for power (MIL-L800i & MIL-L100i) Cable Requirements: 10BASE-T: 2-pair UTP/STP Cat.3,4,5 cable EIA/TIA-568 100-ohm(100m) 100BASE-TX: 2-pair UTP/STP Cat.5 cable EIA/TIA-568 100-ohm(100m) deliver unified supply of data, voice, and video as well as electrical power through a single source by sending power over standard Category 5 and above twisted pair cables. Power over Ethernet simplifies installation and eliminates the need to run separate power cords and LAN cables to each Access Point or port locations. EmPowered Ethernet Single-port Power over Ethernet Injector MIL-L100I PoE Injector Transition Networks Transition Networks, Inc www.transition.com |
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Microsemi PowerDsine PD-9501G Single Port Power Over Ethernet $95.99 1 1 Year 1 x RJ-45 10/100/1000Base-T 1.20 A 10/100/1000Base-T 110 V AC 14.10 oz 220 V AC 3.46" x 2.02" x 6.54" 50 Hz 54 V DC to 57 V DC 60 Hz 60 W Maximum P-T-Z Camera ThinClient PC Video Phone Regulatory Compliance: IEEE 802.3af (PoE) Pre IEEE 802.3at Electromagnetic Emission & Immunity: FCC Part 15, Class B EN 55022 Class B (Emissions) EN 55024 (Immunity) VCCI Safety Approvals: UL/cUL Per EN 60950-1 GS Mark Per EN 60950-1 The PowerDsine 9501G is a single port, high-power solution for remote powering of current and emerging high power applications. Generating a maximum of 60W, the PD-9501G enables remote power for a new range of applications including pan-tilt-zoom (PTZ) cameras, video-phones and thinclients Microsemi Microsemi Corporation PD-9501G PD-9501G/AC PoE Injector PowerDsine PD-9501G Single Port Power Over Ethernet RoHS WEEE Yes www.microsemi.com |
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1 Port RS232 Serial Ethernet Device Server - PoE Power Over Ethernet - device server $132.99 StarTech.com 1 Port RS232 Serial Ethernet Device Server - PoE Power Over Ethernet - Device server - Ethernet Fast Ethernet RS-232 |
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8 Port 10/100 PSU Industrial Power over Ethernet Switch - switch - 8 ports - desktop rack-mountable $182.99 StarTech.com 8 Port 10/100 PSU Industrial Power over Ethernet Switch - Switch - 8 x 10/100 - desktop rack-mountable - PoE |
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Aastra VentureIP Power Over Ethernet Adapter Power Over Ethernet Adapt $54.99 "Aastra VentureIP Power Over Ethernet Adapter Brand New Includes One Year Warranty, Item # D0023-0031-00-00 The Aastra D0023-0031-00-00 inline power adapter supplies 48v power to the 480i and VentureIP phones through the Ethernet cable, as well as optional power of Ethernet injector for networks that do not already have an 802.3af compliant in-line power supply. The D0023-0031-00-00 has multiple protocol support and built in two-port 10/100 Ethernet switch. D0023-0031-00-00 Features: Item #D0023-0031-00-00, Powers Networks That Do Not Already Have An In-Line Power Supply, Multiple Protocol Support, Built In Two-Port 10/100 Ethernet Switch, For Use With The VentureIP 480i and VentureIP Gateway" |
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The Power To Win (Port Adelaide) $10 The Power To Win (Port Adelaide) - Port Adelaide |
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Power Acoustik 300W DC-to-AC Power Inverter with Game Port $24.99 110 V AC 12 V DC 2 x AC Out 300 W Continuous Power 300W DC-to-AC Power Inverter with Game Port 60 Hz This 300W DC-to-AC Power Inverter is with On/Off Switch & easy Snap-on Mounting System Game Port. It is Protected against thermal, over voltage, & under voltage also contain replaceable 20 Amp Spade Fuse. INV-3GP Power Acoustik Power Acoustik Electronics Power Inverter www.poweracoustik.com |
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Kensington Laptop Power Adapter, w/ USB Power Port, Black. Each $81.79 Manufacturer: Kensington. Each. 90 watt power adapter powers more than just most laptops. Built-in USB power port allows it to charge mobile phones, smartphones, PDA, iPhone, iPod, MP3 and more. Safety features include over-current protection; over-voltag |
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4XEM Power Over Ethernet Kit $75.99 1 1 Year 1 x RJ-45 Ethernet 1.42" Height x 2.17" Width x 3.35" Depth 240 V AC 48 V DC 4XEM 4XEM Corporation 50 Hz 60 Hz 90 V AC to 240 V AC 1 x Power Over Ethernet Injector 1 x Power Over Ethernet Splitter 1 x Quick Guide 1 x180cm AC Cord Video Servers Network Cameras Power Over Ethernet (POE) integrates data and power over standard Ethernet cabling. It is a way to supply reliable, uninterrupted power to network cameras in hard to access places using Category 5 cable. Power Over Ethernet technology saves the time and cost of installing separate power cabling and AC outlets for each network camera. The POE Kit consists of an Injector that connects to an Ethernet Switch or Hub and to AC Power, and a Splitter that connects to the DC Jack and RJ-45 port of the Network Camera. A Cat-5 cable runs between the Injector and Splitter to a maximum of 100 meters. One POE Kit is required per Network Camera. Ethernet IPCAMPOEKIT PoE Injector Power Over Ethernet Kit www.4xem.com |
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IC Intracom USA, Inc Intellinet 560399 Ethernet Switch - 8 Port - 4, 4 x 10/100Base-TX - , 10/100Base-TX - Power Over Ethernet $92.53 IC Intracom USA, Inc Intellinet 560399 Ethernet Switch - 8 Port - 4, 4 x 10/100Base-TX - , 10/100Base-TX - Power Over Ethernet |
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Netgear XAVB1004 Ethernet Switch - 200 Mbps HomePlug AV - 4 Port 4 x 10/100Base-TX - Power Over Ethernet XAVB1004100NAS $109.57 Netgear XAVB1004 Ethernet Switch - 200 Mbps HomePlug AV - 4 Port 4 x 10/100Base-TX - Power Over Ethernet XAVB1004100NAS |
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HP V1910-24G-PoE Ethernet Switch - 24 Port - 4 Slot 24 x 10/100/1000Base-T - Power Over Ethernet - 4 x SFP (mini-GBIC) JE007A#A $965.74 HP V1910-24G-PoE Ethernet Switch - 24 Port - 4 Slot 24 x 10/100/1000Base-T - Power Over Ethernet - 4 x SFP (mini-GBIC) JE007A#A |
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Enterasys SSA-T1068-0652 Stand Alone System - 48 Port - 4 Slot - 48 x 10/100/1000Base-T - Power Over Ethernet - 4 x SFP+ Slo... $16192.14 Enterasys SSA-T1068-0652 Stand Alone System - 48 Port - 4 Slot - 48 x 10/100/1000Base-T - Power Over Ethernet - 4 x SFP+ Slo... |
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Adtran NetVanta 1638P Layer 3 Switch - 48 Port - 2 Slot - 48 x 10/100/1000Base-T - Power Over Ethernet - 2 x Expansion Slot... $4714.26 Adtran NetVanta 1638P Layer 3 Switch - 48 Port - 2 Slot - 48 x 10/100/1000Base-T - Power Over Ethernet - 2 x Expansion Slot... |
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Cisco SG300-10P Ethernet Switch - 10 Port - 2 Slot 8, 2 x 10/100/1000Base-T - , 10/100/1000Base-T - Power Over Ethernet - 2 x S $397.81 Cisco SG300-10P Ethernet Switch - 10 Port - 2 Slot 8, 2 x 10/100/1000Base-T - , 10/100/1000Base-T - Power Over Ethernet - 2 x S |
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HP ProCurve 2615-8-PoE Ethernet Switch - 10 Port - 2 Slot 8, 2 x 10/100Base-TX - , 10/100/1000Base-T - Power Over Ethernet - 2 $588.47 HP ProCurve 2615-8-PoE Ethernet Switch - 10 Port - 2 Slot 8, 2 x 10/100Base-TX - , 10/100/1000Base-T - Power Over Ethernet - 2 |
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Adtran NetVanta 1534P Ethernet Switch - 24 Port - 4 Slot - 24 x 10/100/1000Base-T - Power Over Ethernet - 4 x SFP (mini-GBI... $1943.86 Adtran NetVanta 1534P Ethernet Switch - 24 Port - 4 Slot - 24 x 10/100/1000Base-T - Power Over Ethernet - 4 x SFP (mini-GBI... |
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