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Copyright © 2009
Microsemi
7
Rev 1.1 27-Jul-09
Analog Mixed Signal Group
2381 Morse Avenue, Irvine, CA 92614, USA; Phone (USA): (800) 713-4113, (ROW): (949) 221-7100 Fax: (949) 756-0308
2
About the Power over Ethernet
Midspan
PowerDsine’s family of Power over Ethernet Midspans, series 3500G,
injects power over data-carrying Ethernet cabling. The
PD-3506G/3512G/3524G Midspans, support 6, 12 and 24 ports
respectively in a 10/100/1000BaseTx Ethernet network, over TIA/EIA-568
Category 5/5e/6 cabling. DC operating power, for data terminal units, is
fed over unused pairs of the cabling (7/8 and 4/5). The Power over
Ethernet Midspan normally powers devices that are ‘Power over Ethernet
Enabled’or are equipped to receive power over Ethernet. These devices
are called Powered Devices (PDs). Devices that can not receive power
over Ethernet may require an external power adapter to be powered.
Contact PowerDsine for such an adapter.
Power over Ethernet Midspan main features:
Safe and reliable power over existing Ethernet
infrastructure
Eliminates the need for AC outlets, local UPS & AC/DC
adapters near PDs
Remote Management using Web control and/or
SNMPv3
Highest level of Network Security
Safe solution that protects network infrastructure
Standards compliant
2.1 Power
Management
The 3524G Midspan manages the power out to all connected PDs.
Management is requred in situations where:
Too many devices are connected to the
network.
There is a sudden, short surge in power
requirements.
When establishing a network, the total power required by the PDs may
exceed the total power available from the Midspan. The built-in Power
Management feature does not allow total power output to exceed
maximum power available (refer to the Technical Specifications). When
total power available is near maximum, attempts to connect an additional
PD to a free port cause the corresponding LED of the port to blink orange,
