Can an ISDN phone supply power to itself

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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

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

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

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

Why ISDN phone is unavailable
The causes are as follows: - The ISDN phone has no 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 - The phone pin assignment is incorrect. The pin assignment of the ISDN phone differs from that of a common network cable. The ISDN crossover cable is often used to connect the AR router to the ISDN phone. If the ISDN phone obtains power supply and the pin assignment is correct but the fault persists, contact Huawei technical support personnel.

Why is an ISDN phone unavailable
An ISDN phone may be unavailable because of the following reasons: -The ISDN phone power is not supplied properly. 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 -The cable sequence is incorrect. In most cases, ISDN crossover cables are used to connect the AR and an ISDN phone. If the fault persists, contact Huawei technical support personnel.

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