Devices that support the power supply of an external UPM

The UPM is a kind of external uninterruptible power module. It can convert 110 or 220 V AC mains power into �?8 V DC required by transmission devices. It mainly applies to when no �?8 V DC power supply is available or when a storage battery must be used. ?{}?Currently, the external UPM is supported by the OSN 8800 T16 and OSN 6800.

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