H3C Technologies H3C S3100 Series Switches - Manual (Page 664)

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PoE Configuration
PoE Overview
Introduction to PoE
Power over Ethernet (PoE)-enabled devices use twisted pairs through electrical ports to supply power
to the remote powered devices (PD) in the network and implement power supply and data transmission
simultaneously.
Advantages of PoE
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Reliability: The centralized power supply provides backup convenience, unified management, and
safety.
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Easy connection: Network terminals only require an Ethernet cable, but no external power supply.
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Standard: PoE conforms to the 802.3af standard and uses a globally uniform power interfaces;
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Bright application prospect: PoE can be applied to IP phones, wireless access points (APs),
chargers for portable devices, card readers, network cameras, and data collection system.
PoE components
PoE consists of three components: power sourcing equipment (PSE), PD, and power interface (PI).
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PSE: PSE is comprised of the power and the PSE functional module. It can implement PD
detection, PD power information collection, PoE, power supply monitoring, and power-off for
devices.
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PD: PDs receive power from the PSE. PDs include standard PDs and nonstandard PDs. Standard
PDs conform to the 802.3af standard, including IP phones, Wireless APs, network cameras and so
on.
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PI: PIs are RJ45 interfaces which connect PSE/PDs to network cables.
PoE Features Supported by S3100
PoE-enabled S3100 series Ethernet switches include:
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S3100-8TP-PWR-EI
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S3100-16TP-PWR-EI
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S3100-26TP-PWR-EI
Table 1-1 Power supply parameters of PoE switches
Switch
Input
power
supply
Number of
electrical ports
supplying
power
Maximum
PoE
distance
Maximum power
provided by each
electrical port
Total
Maximum
PoE output
power
S3100-8TP-PWR-EI AC input 8 70 W
S3100-16TP-PWR-EI AC input 16 135 W
2403TP-PWR-EA DC input 24
100 m 15400 mW
400 W