Black Box Switch 26592 User Manual

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PoE PD Switches  
Power over Ethernet plus  
fiber options make this  
the perfect switch for  
your network’s edge.  
4/16/2010  
#26592  
1 of 3  
 
Technically Speaking  
Electricity has a low frequency of 60 Hz or less, and data transmis-  
sions have frequencies that can range from 10 million to 100  
million Hz.  
There are two types of devices involved in PoE configurations:  
Power Sourcing Equipment (PSE) and Powered Devices (PD).  
PSEs, which include end-span and mid-span devices, provide  
power to PDs over the Ethernet cable. An end-span device is often  
a PoE-enabled network switch that’s designed to supply power  
directly to the cable from each port. The setup would look some-  
thing like this:  
Power over Ethernet (PoE).  
The seemingly universal network connection, twisted-pair  
Ethernet cable, has another role to play, providing electrical power  
to low-wattage electrical devices. Power over Ethernet (PoE)  
was ratified by the Institute of Electrical and Electronic Engineers  
(IEEE) in June 2000 as the 802.3af-2003 standard. It defines the  
specifications for low-level power delivery—roughly 13 watts at  
48 VDCover twisted-pair Ethernet cable to PoE-enabled devices  
such as IP telephones, wireless access points, Web cameras, and  
audio speakers.  
A mid-span device is inserted between a non-PoE device and  
the network, and it supplies power from that juncture. Here is a  
rough schematic of that setup:  
The way it works is simple: Ethernet cable that meets CAT5  
LPD100A  
(or better) standards consists of four twisted pairs of cable,  
and PoE sends power over these pairs to PoE-enabled devices.  
Power injectors, a third type of PSE, supply power to a specific  
point on the network while the other network segments remain  
without power.  
PDs are devices like switches, surveillance cameras, sensors,  
wireless access points, and any other devices that operate on PoE.  
In one method, two wire pairs are used to transmit data,  
and the remaining two pairs are used for power. In the other  
method, power and data are sent over the same pair.  
When the same pair is used for both power and data,  
the power and data transmissions don’t interfere with each other.  
Because electricity and data function at opposite ends of the  
frequency spectrum, they can travel over the same cable.  
LPD101A  
Item  
Code  
PoE PD Switches  
(5) 10/100BASE-T  
(4) 10/100BASE-T plus (1) SFP Slot  
(3) 10/100BASE-T plus  
(1) 100BASE-SX, Multimode, 850-nm  
300 m, ST®  
TYPICAL APPLICATIONS  
LPD100A  
LPD101A  
• Use one set of twisted-pair wires for both data and power.  
• Save money by eliminating the need to run electrical wiring.  
• Quickly set up a temporary workgroup.  
• If your LAN is protected from power failure by a UPS, the PoE PD  
Switches connected to your LAN are also protected from power  
failure.  
LPD102A  
LPD103A  
300 m, SC  
(3) 10/100BASE-T plus (1) 100BASE-SX, Multimode, 1300-nm  
2 km, ST  
2 km, SC  
LPD104A  
LPD105A  
• Use the switch increase the range of your copper network by  
enabling you to add up to another 100 meters of UTP cabling.  
Back view: LPD105A  
(3) 10/100BASE-T plus (1) 100BASE-SX, Single-Mode 1310-nm  
40 km, ST  
40 km, SC  
80 km, ST  
80 km, SC  
LPD106A  
LPD107A  
LPD108A  
LPD109A  
LPD110A  
100 km, SC  
T Ec h S PEc S  
Standards — IEEE 802.3x, IEEE 802.3u, IEEE 802.3af  
CE Approval — Yes  
Environmental — Operating temperature: +32 to +122° F (0 to +50° C);  
Storage temperature: -13 to +158° F (-25 to +70° C);  
Humidity: 5% to 90% noncondensing  
Power — Inline PoE Power injector  
Size — 1.6"H x 4.8"W x 7.3"D (4.1 x 12.2 x 18.5 cm)  
Weight — 1.8 lb. (0.8 kg)  
(3) 10/100BASE-T plus  
(1) Single-Strand 100BASE-FX, Single-Mode  
20 km, SC (Order one of each.)  
1310-nm TX/1550-nm RX  
1550-nm TX/1310-nm RX  
40 km, SC (Order one of each.)  
1310-nm TX/1550-nm RX  
1550-nm TX/1310-nm RX  
60 km, SC (Order one of each.)  
1310-nm TX/1550-nm RX  
1550-nm TX/1310-nm RX  
LPD111A  
LPD112A  
LPD113A  
LPD114A  
LPD115A  
LPD116A  
4/16/2010  
#26592  
3 of 3  
 

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