This is a 2-State signaling scheme, using the “B-bit” for signaling.

This is a two-state signaling scheme, using the "B bit" for signaling.

The codec utilizes a signaling scheme to signal various permutations of flexible quantization combinations efficiently for primary usage scenarios.

Digital E&M signaling is a two-state signaling scheme (on-hook and off-hook) commonly used on digital four-wire CO and tie trunks.