Can the AR router connected to a PoE power supply provide power for itself

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The AR provides PoE power for downstream terminals. The AR equipped with the 100 W AC power module provides power for PDs connected to FE interfaces. The PDs include IP phones, APs, and cameras.
PoE models: AR207V-P and AR201VW-P; interfaces: Ethernet0/0/0 to Ethernet0/0/7
PoE model: AR151W-P; interfaces: Ethernet0/0/0 to Ethernet0/0/4
PoE models: AR1220V, AR1220W, and AR1220VW; interfaces: Ethernet0/0/4 to Ethernet0/0/7
All GE electrical interfaces on the 4ES2GP-S card support PoE, but the AR must be equipped with the 100 W AC PoE module.

Other related questions:
Can an ISDN phone supply power to itself
An ISDN phone's power can be supplied by itself or using the remote PBX. By default, no power is supplied to the AR's 2BST (BRA) board connecting to the ISDN phone. To supply power to the 2BST (BRA) board, run the remote-power command. The detailed configuration is as follows:
 system-view 
[Huawei] voice 
[Huawei-voice] port bra 3/0/0 
[Huawei-voice-bra3/0/0] remote-power enable

PoE power module of an S series switch
Configuration and power of PoE power modules on S series switches are as follows: The fixed series switches that have PWR or PWH in their names support PoE. 1. You can use Hardware Query Tool to query the configuration and power of PoE power modules on S series switches. 2. Among modular switches (S7700, S9700, S9300, and S12700), only the S7700 and S9300 support the PoE function. If a switch is running V200R006 or a later version, it allows 800 W AC, 2200 W AC, and 2200 W DC power modules in PoE power slots. If the input voltage is 220 V AC, the PoE power is 800 W or 2200 W. If the input voltage is 110 V AC, the PoE power is 400 W or 1100 W (the S7712 and S9312 do not support 110 V AC). Only ES0D0G48VA00 cards of the S7700 and LE0DG48VEA00 cards of the S9300 support the PoE function. Dual power modules with the same power can be installed to provide power for PDs in load balancing mode. The total power is the sum of two power modules. The number of PoE interfaces supported by a switch is the result of dividing the available PoE power by 15.4 W (802.3af), 30 W (802.3at), or 60 W (802.3bt). Generally, a 250 W power module supports eight interfaces of 15.4 W. A 500 W power module supports 24 interfaces of 15.4 W and 12 interfaces of 30 W. For details, see Tell You About PoE.

Can the ISDN phone provide power supply
ISDN phones can obtain power by themselves or through the remote PBX. By default, the 2BST (BRA) card does not provide power when the AR router is connected to an ISDN telephone. If power supply is required, run the remote-power enable command. system-view [Huawei] voice [Huawei-voice] port bra 3/0/0 [Huawei-voice-bra3/0/0] remote-power enable

How much voltage does a PoE power module on an S series switch provide
The PoE voltage on an S series switch is the range 44 V to 57 V, and the typical value is 48 V. A PoE switch does not support 24 V.

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