Furuno WN-701-W, User Manual

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14
6-3 Notes on PoE Power Supply
Power is fed from PoE power source through the Ethernet cable. This method is
handy because connection of power cable is not required. Two types of PoE
power sources are available, “Mid Span” and “PoE Hub”.
- The mid span is placed between a hub and access point. The access point is
powered from the mid span.
- The PoE hub incorporates both a hub and PoE power source, and an access
point is connected to it directly.
NOTE: - Use a mid span or PoE hub approved by FURUNO SYSTEMS only.
Do not use proprietary products of other makes.
- Each power source (mid span or PoE hub) has output capacity, and the
number of access points hosted is limited. It is recommended to limit the
number of access points so that totaled power consumption of all the
connected access points may not exceed 50% of the capacity of the
power source. This rule lowers the load of the power source, thereby
increasing the reliability of the total system. Usually, this rule is met if
half of the ports of each power source are left unused (open).
- Stick a label to the power supply-end of each Ethernet cable so that you
may identify which access point is connected. (These measures are
helpful when turning on-off specific access points for testing.)
Access Point
Computer
AC
Ethernet (LAN)
HUB
Mid Span
(IEEE802.3af)
Ethernet
PoE HUB
(IEEE802.3af)
Computer
Ethernet (LAN)
Ethernet Ethernet Ethernet
AC
Access Point Access Point
Access Point
Configuration with Mid Span
Configuration with PoE Hub