This technique, however implemented, avoids additional wires in the data cable devoted only to transmission management, which saves money. A sensible protocol for the use of such transmission flow control signals must be used, to avoid potential deadlock conditions, however.
Even though this technique is implemented, it avoids using extra wires in the data cable that are only for managing data transmission, which saves money. To ensure proper operation, a clear protocol must be established for how these flow control signals are used to avoid any deadlocks.