Web Management Guide-R07

Table Of Contents
Chapter 13
| Basic Administration Protocols
Power over Ethernet
– 360 –
Default: 370000 milliwatts
ECS2100-28PP: 50000-740000 milliwatts with external power supply,
Default: 740000 milliwatts)
System Operation Status – Status of the PoE power service provided to the
switch ports.
PoE Power Consumption – The amount of power being consumed by PoE
devices connected to the switch.
Software Version – The version of software running on the PoE controller
subsystem in the switch.
Compatible Mode – Allows the switch to detect and provide power to
powered devices that were designed prior to the IEEE 802.3af PoE standard.
(Default: Disabled)
The switch automatically detects attached PoE devices by periodically
transmitting test voltages that over the Gigabit Ethernet copper-media ports.
When an IEEE 802.3af or 802.3at compatible device is plugged into one of these
ports, the powered device reflects the test voltage back to the switch, which
may then turn on the power to this device. When the compatibility mode is
enabled, this switch can detect IEEE 802.3af or 802.3at compliant devices and
the more recent 802.3af non-compliant devices that also reflect the test
voltages back to the switch. It cannot detect other legacy devices that do not
reflect back the test voltages.
For legacy devices to be supported by this switch, they must be able to accept
power over the data pairs connected to the RJ-45 ports.
Maximum Allocation Mode – Sets the maximum power allocation mode
based on PD (powered device) class or user configuration. (Default: Class)
Class – Power allocation is based on device classification.
The IEEE standard does not define the maximum power of each PD class.
The following table is an example from Microsem's PoE IC implementation.
User – Power allocation is based on user configuration as defined in the
PoE Maximum Allocation Power setting on this page or as defined on the
Administration > PoE > PSE (Configure Interface) page.
Table 23: Maximum PoE Based on PD Classification
PD Class Maximum Power (Watts)
Class 0 (AF) 16.1
Class 0 (AT) 33.6
Class 1 4.2
Class 2 7.3
Class 3 16.1
Class 4 33.6