802.3bt - 无线下载-AP固件WiFi软件

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Understanding the IEEE 802.3bt PoE Standard

分类：无线标准下载：0 浏览：886 时间：2021-01-07

By Charlie Ice, Senior Product Manager, PoE Products, Silicon Labs and Kevin Kilbane, Senior Product Manager, PoE Products, Silicon Labs • Power over Ethernet provides both data and power over a single Ethernet cable. • The latest IEEE PoE standard, 802.3bt, provides up to 90 W of power onto an Ethernet cable while maintaining backwards compatibility with olde Introduction With the introduction of the IEEE 802.3bt Power over Ethernet (PoE) standard, Ethernet cables can now carry up to 90 W of power, enabling a broad range of new applications. Yet, despite being in the market for over a decade, PoE technology can still be very confusing and misunderstood. The latest standard adds additional features beyond just increased power delivery, and it is also more complex than previous standards. In this white paper we will go over the basics of how PoE works, and then look the key features in the new 802.3bt standard.

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Overview of 802.3bt - Power over Ethernet standard

分类：无线标准下载：5 浏览：751 时间：2021-01-07

Lennart Yseboodt, Philips Lighting David Abramson, Texas Instruments April 2018 Contents 1 Introduction 7 2 System overview 8 2.1 Power Interface 2.2 Class 2.3 Device Types 2.4 Cable / link section requirements 2.5 2-pair and 4-pair powering 3 Detection 14 4 Connection check and PD signature configuration 16 4.1 Single-signature PD configuration. 4.2 Dual-signature PD configuration 4.3 Requirements to provide 4-pair power 5 Classification 20 5.1 Classification terminology 5.2 Class probing 5.3 Mutual identification 5.4 Data Link Layer Classification. 6 Autoclass 28 6.1 PSE Autoclass requirements . 6.2 PD Autoclass requirements 7 Inrush 31 7.1 PSE inrush 7.2 PD inrush 8 Operating power 34 8.1 PD power limits 8.2 PSE power 8.3 Powering configurations. 9 Current unbalance 41 9.1 PSE current unbalance 9.2 PD current unbalance. 10 Maintain Power Signature (MPS) 43 10.1 PSE MPS measurements. 10.2 PD MPS design consideration 11 LLDP Power over Ethernet TLV 49 11.1 Power via MDI Measurements TLV

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