PoE Detection Types

The following table identifies product support for the different PoE types.

Table 1. PoE type support
Product	Highest PoE Standard
5320-16P-4XE 5320-16P-4XE-DC 5320-24P-8XE 5320-48P-8XE	802.3at Type 2 PoE (30W) on BASE-T ports
5420F-48P-4XE 5420F-48P-4XL 5420F-24P-4XE	802.3at Type 2 PoE (30W)
5420F-8W-16P-4XE	802.3bt Type 4 PoE (90W) on 8 ports 802.3at Type 4 PoE (30W) on 16 ports
5420F-16W-32P-4XE 5420F-16MW-32P-4XE	802.3bt Type 4 PoE (90W) on 16 ports 802.3at Type 4 PoE (30W) on 32 ports
5420M-24W-4YE 5420M-48W-4YE	802.3bt Type 4 PoE (90W)
5420M-16MW-32P-4YE	802.3bt Type 4 PoE (90W) on 16 ports 802.3at Type 4 PoE (30W) on 32 ports
5520-12MW-36W	802.3bt Type 4 PoE (90W)
5520-24W	802.3bt Type 4 PoE (90W)
5520-48W	802.3bt Type 4 PoE (90W)
5720-24MW 5720-48MW 5720-24MXW 5720-48MXW	802.3bt Type 4 PoE (90W)

The global configured detection type specifies the following versions of the IEEE standard to support. Standards are arranged from oldest (top) to newest (bottom).


Detection Type	Power Mode
802.3af	Normal
802.3af and legacy	Normal
802.3at	High
802.3at and legacy	High
802.3bt type 3	Normal
802.3bt type 4	Normal
802.3bt and legacy	Normal

The default detection type is automatically configured for the highest PoE standard supported on the switch.

Note

802.3at is backwards compatible with 802.3af. Therefore, both normal power and high power devices are supported in this mode.

Changing from a newer IEEE standard to an older IEEE standard is permitted, however power delivery is interrupted during this operation, and all PoE devices are reset. There is no service interruption when changing from an older IEEE standard to a newer IEEE standard.