FIBERROAD FR-5A3010P, Руководство пользователя, Страница: 7 / 11

User Manual
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Power over Ethernet Powered Device
Voice over IP Phones
(3-5 Watts)
IP Camera
（
10-12 Watts)
Wireless LAN Access Points
(6-12 Watts)
PAN/Tilt/Zoom Cameras
(30 Watts)
Remote Computer
(30 Watts)
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PoE Power Supply Budget Calculation
Step1: Add Up The Demand For PoE In Watts
Add up the expected demand for power for each Powered Device (PD) in
watts. Allow for the maximum power and upper end of PD classification. Any
unspecified devices should be assumed Class 0.
For example, an IEEE802.3af, Class 0 device may consume 9 watts; however, as it’s
Class 0, assume 15.4 watts.
Round the numbers up , occasionally, to account for the additional consumption of
the UTP (unshielded twisted-pair) ethernet cable that runs between the PD and PoE
switch.
For example, if an IEEE802.3at Class 4 IP camera consumes 25.5 watts, round to 30
watts, which adds a buffer to balance out the loss between the PoE switch and the
device.