Allied Telesis AT-SBX31CFC Maximum Range Maximum # Class Usage, Ports with, Available at PoE PSU

Chapter 1: Overview

Table 8. IEEE802.3at Classes versus AT-SBx31GP24 Power Levels

		Maximum	Range of	Maximum # of		Maximum # of
Class	Usage	Power Levels	Power Levels	Ports with		Ports with
		Output at the	Available at	1	PoE PSU	2 PoE PSU’s
		PoE port	the PD Input	(1200 W)		(2400 W)
0	Default	15.4W	.044W to	77		155
			12.95W
1	Optional	4.0W	0.44W to 3.84W	240		240
2	Optional	7.0W	3.84W to 6.49W	171		240
3	Optional	15.4W	6.49W to	77		155
			12.95W
4	Optional	30.0W	12.95W to	40		80
			25.9W

The PoE power is supplied to the PoE ports on a first come basis. By default, the highest PoE priority starts from slot 0, port 0 and decreases as the PoE slot/port numbers ascend to the last PoE port.

For example, if you have one AT-SBx3165 PoE Power Supply and two AT-SBx31GP24 PoE Line Cards are installed and 40 Class 4 PDs connected to slot/ports 0/0 through 0/23 and 1/0 through 1/15, they all receive the full 30 W of PoE power or a total of 1200W. If more than 40 PDs are connected, the highest slot/port numbers have a flashing amber or fault condition because all the available PoE power (1200 W) are allocated to the first 39 ports and no additional PoE power is available for the additional PDs.

Note

The PoE port priorities can be reassigned using the port configuration commands in the Switchblade x3112 Management Software. Refer the to the Software Reference for SwitchBlade® x3100 Series Switches on the ATI web site for specific information. Go to “Where to Find Web-based Guides” on page 13 for information about how to navigate to this document.

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