What is the purpose of frame synchronization?

What is the function of frame synchronizing bit in a T 1 digital system?

Frame synchronization is necessary to identify the timeslots within each 24-channel frame. Synchronization takes place by allocating a framing, or 193rd, bit. This results in 8 kbit/s of framing data, for each DS1.

Do I need genlock?

Why use genlock? In terms of avoiding drift and providing syncing points for postproduction, wireless timecode is a great tool, but if you want really accurate synchronisation for long takes and all day shooting, it's important to also genlock the cameras to a common sync source.

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