How long is the maximum PoE power supply distance


Based on IEEE802.3af and IEEE802.3at, Category 5 cables provide a maximum of 100 m power supply distance.

Other related questions:
PoE power supply distance of a WLAN device
According to IEEE 802.3af/at standards, Category 5 cables provide a maximum of 100 m power supply distance.

Distance at which PoE power is provided to an S series switch
A PoE S series switch can provide power to PDs over a distance of up to 100 m.

Check the PoE status on an S series switch
Command for displaying PoE status of S series switches:

<HUAWEI> display poe information
PSE Information of slot 0:
    User Set Max Power(mW)     : 739200     //Set the maximum output power. Use the maximum power by default.
    POE Power Supply(mW)       : 369600     //PoE power supply, which is determined by the PoE power supply configured on the device.
    Available Total Power(mW)  : 369600     //Total available power.
    Total Power Consumption(mW): 0          //Total output power.     
    Power Peak Value(mW)       : 0          //Peak output power.  
    Power-Management Mode      : auto
    Power High Inrush          : disable

<HUAWEI> display poe power interface gigabitethernet 0/0/3
Port PD power(mW)           : 3710          //Output power of the interface.                                           
Port PD class               : 2             //Classes of PDs. The system classifies PDs based on their maximum power.                                           
Port PD reference power(mW) : 7000          //Reference power of the PD.                                   
Port user set max power(mW) : 15400         //Set the maximum output power of the port.                                    
Port PD peak power(mW)      : 3816          //Peak power of the PDs connected to the port.                                          
Port PD average power(mW)   : 3487          //Average power of the PDs connected to the port.    

Analog phone connection between IAD and maximum long distance
Line length should not exceed 5KM, diameter is 0.44mm.

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