Aerohive HiveAP 20, Руководство по развертыванию

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Chapter 2 The HiveAP 20 ag Platform
26 Aerohive
Ethernet and Console Ports
There are two ports on the HiveAP 20: a 10/100Base-T/TX Ethernet port and a male DB-9 console port. Both ports
use standard pin assignments.
The pin assignments in the PoE (Power over Ethernet) Ethernet port follow the TIA/EIA-568-B standard (see
Figure 2 ). The PoE port accepts 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. 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 port has 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
Pin T568A Wire Color
1 White/Green
2 Green
3 White/Orange
4 Blue
5 White/Blue
6 Orange
7 White/Brown
8 Brown
(View of the PoE port
on the HiveAP)
1 8
Pin Numbers
Pin T568B Wire Color
1 White/Orange
2 Orange
3 White/Green
4 Blue
5 White/Blue
6 Green
7 White/Brown
8 Brown
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)
Pin Data Signal MDI MDI-X MDI or MDI-X
1 Tr DC+ DC – – – –
2 Transmit - DC+ DC – – – –
3 R DC – DC+ – – –
4 (unused) – – – – – – DC+
5 (unused) – – – – – – DC+
6 Receive - DC – DC+ – – –
7 (unused) – – – – – – DC –
8 (unused) – – – – – – DC –
MDI = Medium dependent interface for straight-through connections
MDI-X = Medium dependent interface for cross-over (X) connections
The PoE port is auto-sensing and can automatically adjust to transmit and receive data over straight-through or cross-over Ethernet
connections. Likewise, it can automatically adjust to 802.3af Alternative A and B power delivery methods. Furthermore, when the
Alternative A method is used, the PoE port automatically allows for polarity reversals depending on its role as either MDI or MDI-X.
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/ 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.