SMC Networks SMC2890W-AN, Руководство по установке

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Power and Grounding
This chapter focuses on how to power-on the AP. The AP can be powered using the
included PoE Power Injector or by a direct connection to a PoE LAN switch.
Connecting the AP to ground is also covered.
This chapter includes these sections:
◆
“Power Injector Module” on page 29
◆
“How to Ground the Unit” on page 31
◆
“How to Install the Power Injector” on page 32
Power Injector Module
The AP receives power through its network cable connection using power-over-
Ethernet technology. A power injector module is included in the AP package and
provides two RJ-45 Ethernet ports, one for connecting to the AP (DATA & POWER
OUT), and the other for connecting to a local LAN switch (DATA IN).
The DATA IN port uses an MDI (that is, internal straight-through) pin configuration.
You can therefore use straight-through twisted-pair cable to connect this port to
most network interconnection devices such as a switch or router that provide MDI-
X ports. However, when connecting the access point to a workstation or other
device that does not have MDI-X ports, you must use crossover twisted-pair cable.
Figure 15: PoE Power Injector
Ethernet from Local Network LED Indicator
Ethernet and Power to AP AC Power Socket (Hidden)
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