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    DCO-1781: 4 AES Audio Change-over with Silent Switch Option Datasheet (GVB-1-0355B-EN-DS) File size: 573.9 KB, posted Jun 06 2016
    The DCO-1781 from Grass Valley, a Belden Brand, is a 4 AES change-over. The switch is performed electronically by an internal router. In the event of a power failure, the signal is protected by the relays fitted on the rear module, maintaining the integrity of the selected signal at the output. The DCO card allows switching as a regular router, or alternatively the module can perform an audio silent switch between sources using the silent switch software option.