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5
Install Guide
5.1 Use PoE or external Power Adapter
I55A&I55A-Z&I57A&I57A-Z, called as ‘the device’ hereafter, supports two power supply modes,
power supply from external power adapter or over Ethernet (PoE) complied switch.
PoE power supply saves the space and cost of providing the device additional power outlet. With a
PoE switch, the device can be powered through a single Ethernet cable which is also used for data
transmission. By attaching UPS system to PoE switch, the device can keep working at power outage
just like traditional PSTN telephone which is powered by the telephone line.
For users who do not have POE equipment, the traditional power adaptor should be used. If the
device is connected to both POE switch and external power adapter, device will get power supply
from POE switch in priority, and change to external power adapter once the POE power supply fails.
Please use the power adapter supplied by Fanvil and the PoE switch met the specifications to
ensure the device work properly.