User's Manual

Chapter 4 The HiveAP 340 Platform
48 Aerohive
Ethernet and Console Ports
There are three ports on the HiveAP 340: two RJ-45 10/100/1000Base-T/TX Ethernet ports and an RJ-45 console port.
The pin assignments in the PoE (Power over Ethernet) Ethernet ports follow the TIA/EIA-568-B standard (see
Figure2). The ports accept standard types of Ethernet cable—cat3, cat5, cat5e, or cat6—and can receive power
over this cable from power sourcing equipment (PSE) that is 802.3af-compatible. If you use cat5, cat5e, or cat6
cables, the HiveAP 340 can also support 802.3at-compliant PSE. Such equipment can be embedded in a switch or
router, or it can come from purpose-built devices that inject power into the Ethernet line en route to the HiveAP.
Because the PoE ports have autosensing capabilities, the wiring termination in the Ethernet cable can be either
straight-through or cross-over.
Figure 2 PoE Wire Usage and Pin Assignments
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Pin T568A Wire Color
1White/Green
2Green
3White/Orange
4Blue
5White/Blue
6Orange
7White/Brown
8Brown
(View of the ETH0 PoE
Port on the HiveAP 340)
8 1
Pin Numbers
Pin T568B Wire Color
1White/Orange
2Orange
3White/Green
4Blue
5White/Blue
6Green
7White/Brown
8Brown
T568A-Terminated Ethernet Cable
with an RJ-45 Connector
802.3af Alternative A
(Data and Power on
the Same Wires)
802.3af Alternative B
(Data and Power on
Separate Wires)
802.3at Wiring Options
Pin Data Signal MDI MDI-X MDI or MDI-X 1 2 3 4
1Transmit +DC+DC–– – – DC1+DC1– DC1+DC1–
2Transmit -DC+DC–– – – DC1+DC1– DC1+DC1–
3Receive +DC– DC+ – – – DC1– DC1+DC1– DC1+
4(unused) – – –– – –DC+ DC2+DC2+DC2– DC2–
5(unused) – – –– – –DC+ DC2+DC2+DC2– DC2–
6Receive -DC– DC+ – – – DC1– DC1+DC1– DC1+
7(unused) – – –– – –DC– DC2– DC2– DC2+DC2+
8(unused) – – –– – –DC– DC2– DC2– DC2+DC2+
MDI = Medium dependent interface for straight-through connections
MDI-X = Medium dependent interface for cross-over (X) connections
The PoE ports are auto-sensing and can automatically adjust to transmit and receive data over straight-through or cross-over Et
herne
connections. Likewise, they can
automatically adjust to 802.3af Alternative A and B power delivery methods. Furthermore, when t
he
Alternative A method is used, the ports automatically allow for polarity reversals depending on their role as either MDI or MDI
-X. In
802.3at, the 1/2 and 3/6 wire pairs connect to DC source 1 and 4/5 and 7/8 pairs to DC source 2 in PSE. Although the exact pola
rity
depends on the PSE design, the HiveAP 340 Ethernet ports can support all possible options.
T568B -terminated Ethernet Cable
with an RJ-45 Connector
T568A and T568B are two standard
wiring termination schemes. Note that
the only difference between them is
that the white/green + solid green pair
of wires and the white/orange + solid
orange pair are reversed.
For straight-through Ethernet
cables—using either the T568A or
T568B standard—the eight wires
terminate at the same pins on each
end.
For cross-over Ethernet cables, the
wires terminate at one end according
to the T568A standard and at the
other according to T568B.