Interface with telephone system/TCSS/fire fighting system/radio system/passager information system(PIS) etc.

1. The power amplifier combination can be 1 main + 1 backup, 2 main + 1 backup, 3 main + 1 backup, 4 main + 1 backup, 5 main + 1 backup, up to 5 main + 1 backup; Flexible collocation;

1. A/B system host active backup hot backup. 2. A/B active and standby power amplifier hot backup. 3. The speaker cable is connected to the spare power amplifier. The main power amplifier works normally. When the main power amplifier fails, it will automatically switch to the backup power amplifier. 4. All power amplifiers are IP power amplifiers. 5. The dispatcher and the main and backup IP power amplifiers are automatically connected to the A/B host, and when the A host fails, it will automatically switch to the B host. 6. The warning light control box supports that when the broadcast is started, the warning lights are turned on, and when the broadcast is ended, the warning lights are turned off. 7. A single smart speaker uses the original audio circuit to perform fault self-detection and report actively. 8. Speaker circuit loop detection.