How The C360-Pwr Switches Detect A Powered Device; Specific Resistance Signature (Ieee 802.3Af); Pd Connected - Avaya C360 Installation And Configuration Manual

Avaya C360 Power over Ethernet Features

How the C360-PWR Switches Detect a Powered Device

The C360-PWR switches use the specific resistance powered device signature and PD
(powered device) connection verification to determine whether to supply power to a give port.
Figure 33 shows the process.
Figure 33: Powered Device Detection

Specific Resistance Signature (IEEE 802.3af)

The C360-PWR switches apply a low voltage to the power feed pairs and measures the current.
A resistance of 19kΩ to 26.5kΩ is considered valid according to the IEEE standard; if a valid
signature is detected, power is supplied to the port.

PD Connected

Once power is provided to a port, it is checked periodically to see if a PD is still connected. If a
PD is disconnected from a powered port, then power is denied to the port.
188 Installation and Configuration Guide Avaya C360 Multilayer Stackable Switches, version 4.5
Start Check
Valid
Resistance
Signature?
No
No
Yes
Apply Power
Yes
PD still
connected?