Allied Telesis AT-IX5-28GPX manual Powered Device Classes

Chapter 1: Overview

Powered Device Classes

Cable Requirements

Powered devices are grouped into the five classes listed in Table 1 on page 24. The classes are based on the amount of power the devices require. The switches support all five classes.

Table 1. IEEE Powered Device Classes

	Class	Maximum Power Output	PD Power Range
		from a Switch Port
0		15.4W	0.44W to 12.95W
1		4.0W	0.44W to 3.84W
2		7.0W	3.84W to 6.49W
3		15.4W	6.49W to 12.95W
4		30.0W	12.95W to 25.5W

The cable requirements for ports operating at 10 or 100Mbps are given in Table 2.

Table 2. Twisted Pair Cable Requirements for the 10/100Base-TX Ports at 10 or 100Mbps

		10Mbps			100Mbps
Cable Type
	Non-	PoE	PoE+	Non-	PoE	PoE+
	PoE			PoE
Cat 3: Standard TIA/EIA 568-B-	Yes	Yes	No	Yes	Yes	No
compliant Category 3 shielded
or unshielded cabling with 100
ohm impedance and a
frequency of 16 MHz.
Cat 5: Standard TIA/EIA 568-A-	Yes	Yes	No	Yes	Yes	No
compliant Category 5 shielded
or unshielded cabling with 100
ohm impedance and a
frequency of 100 MHz.
Cat 5e: Standard TIA/EIA 568-	Yes	Yes	Yes	Yes	Yes	Yes
B-compliant Enhanced
Category 5 (Cat 5e) shielded or
unshielded cabling with 100
ohm impedance and a
frequency of 100 MHz.
Cat 6 or 6a: Standard TIA/EIA	Yes	Yes	Yes	Yes	Yes	Yes
568-B-compliant Category 6 or
6a shielded cabling.

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