Installation
32
Instruction Manual - NXA-ENET8-POE+
Power-over-Ethernet
The PoE switch supports both IEEE 802.3af and IEEE 802.3at-2009 PoE standards. These switches are excellent choices for
supplying power to connected PoE devices such as web cameras, IP telephones, or access points.
Any PoE-compliant device attached to a port can directly draw power from the switch over the Ethernet cable without requiring its
own separate power source. This capability gives network administrators centralized power control for devices such as IP phones
and wireless access points, which translates into greater network availability.
For each attached PoE-compliant device, the switch automatically senses the load and dynamically supplies the required power.
The switch delivers power to a device using the wire pairs in UTP or STP cable.
Follow these steps to connect cables to 1000BASE-T RJ-45 twisted-pair copper ports:
1.
Attach one end of a twisted-pair cable segment to the device's RJ-45 connector.
2.
Attach the other end to an available port on the switch. Make sure each twisted pair cable does not exceed 100 meters (328 ft)
in length.
3.
As each connection is made, the Link LED (on the switch) corresponding to each port will turn on green to indicate that the
connection is valid.
Connecting to SFP Fiber Optic Ports
The switch provides four slots for SFP-compliant fiber-optic transceivers.
Note that all 1000BASE fiber optic ports operate at 1 Gbps full duplex. All 100BASE fiber optic ports operate at 100 Mbps full
duplex.
NOTE:
The length of fiber optic cable for a single switched link should not exceed the relevant standards specified in this section.
However, power budget constraints should also be considered when calculating the maximum fiber optic cable length for a particular
link.
NOTE:
Maximum distances may vary for different SFP vendors.
NXA-ENET8-POE+ PoE Power Budget
Total PoE Power Budget
125W
Ports supply up to 15.4W
simultaneously
8
Ports supply up to 30W
simultaneously
4
Maximum Gigabit Ethernet Fiber Cable Lengths
Cable Type
Fiber Bandwidth
Maximum Cable Length
Connector
1000BASE-SX
62.5/125 micron multimode
160 MHz/km
2-220 m (7-722 ft)
LC
200 MHz/km
2-275 m (7-902 ft)
LC
50/125 micron multimode
400 MHz/km
2-500 m (7-1641 ft)
LC
500 MHz/km
2-550 m (7-1805 ft)
LC
1000BASE-LX
9/125 micron single-mode
N/A
2 m-10 km (7 ft-6.2 miles)
LC
1000BASE-LH
9-125 micro single-mode
N/A
2 m-80 km (7 ft-50 miles)
LC
1000BASE-BX10
9-125 micro single-mode
simplex fiber
2 m-10 km (7 ft-6.2 miles)
LC
1000BASE-BX20
9-125 micro single-mode
simplex fiber
2 m-20 km (7 ft-12.4 miles) LC
100BASE-BX20
9-125 micro single-mode
simplex fiber
2 m-20 km (7 ft-12.4 miles) LC