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The most common frame synchronization schemes are:
* '''Framing bit'''. A common practice in [[telecommunication]]s, for example in [[T-carrier]], is to insert, in a dedicated [[time slot]] within the frame, a noninformation bit or '''framing bit''' that is used for
* '''Syncword framing'''. Some systems use a special [[syncword]] at the beginning of every frame.▼
▲A common practice in [[telecommunication]]s, for example in [[T-carrier]], is to insert, in a dedicated [[time slot]] within the frame, a noninformation bit or '''framing bit''' that is used for the actual [[synchronization]] of the incoming data with the receiver. In a bit stream, framing bits are used in determining the beginning or end of a frame. They occur at specified positions in the frame, do not carry information, and are usually repetitive.
* '''CRC-based framing'''. Some telecommunications hardware uses [[CRC-based framing]].▼
▲Some systems use a special [[syncword]] at the beginning of every frame.
▲Some telecommunications hardware uses [[CRC-based framing]].
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