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T1 Robbed Bit

Type of signaling used during T1 transmissions in which the D channel is buried with the B channels, using the least-significant bits. T1 Robbed Bit circuits provide a simple signaling mechanism between the customer premise equipment and the central office. Each side transmits one (sometimes two) signaling bits, which can be set to 0 or 1 to the other side; the status of the signaling bit corresponds to the status of the cell.

Related Terms:

B Channel
D Channel