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In the analog system, the VTH cannot get power on on a single bus
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The distributor cannot supply power to the VTH or the power supply is abnormal
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The screen freezes when the VTH calls or monitors the VTO
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Analog VTH shows blue screen of death when monitoring VTO
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When the VTO is talking with the VTH, the video on the VTH freezes or there is no video
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The analog VTH is connected to the networked controller, calling and unlocking functions are normal while there is no video
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When the VTH calls VTS, we cannot hear the sound of the VTH from the VTS side
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The VTH is connected to the detector and alarms as soon as it is armed
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When the VTH is connected to the detector, no alarm will be generated
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We can see the image from VTH or management unit, but the door cannot be unlocked
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The VTH or management unit cannot unlock the door phone remotely
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The digital VTH is online while the registration shows offline, and it cannot be called
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VTH cannot be added with VTO
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The status of analog VTH changes between online and offline frequently
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The analog VTH is offline
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After the platform checks the card successfully, the door cannot be opened on the device.
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In the analog system, the VTH cannot get power on on a single bus.
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The distributor cannot supply power to the VTH or the power supply is abnormal.
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The screen freezes when the VTH calls or monitors the VTO.
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Analog VTH shows blue screen of death when monitoring VTO.
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When the VTO is talking with the VTH, the video on the VTH freezes or there is no video.
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The analog VTH is connected to the networked controller, calling and unlocking functions are normal while there is no video.
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There is no video when the VTO intercoms with VTH (or VTS) or the VTH (or VTS) monitors the VTO.
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When the VTH calls VTS, we cannot hear the sound of the VTH from the VTS side.
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When the one-key alarm is connected to the U8000 platform or others, the sound on the platform side is normal, but the device side receives noise.
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The VTH is connected to the detector and alarms as soon as it is armed.
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When the VTH is connected to the detector, no alarm will be generated.
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We can see the image from VTH or management unit, but the door cannot be unlocked.
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The VTH or management unit cannot unlock the door phone remotely.
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The digital VTH is online while the registration shows offline, and it cannot be called.