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Chapter 2: Ethernet Line Cards
A. Power is transmitted on strands 1, 2, 3, and 6. Thus, the line card can
support PDs that receive power using Alternative A.
PDs that comply with the IEEE 802.3af and 802.3at standards are
required to support both power delivery methods. However, non-standard
PDs and PDs that were manufactured before the completion of the IEEE
802.3af and 802.3at standards and that support only Alternative B will not
work with the AT-SBx81GP24 PoE Line Card.
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