This read-only INTEGER counts the number of times incoming async data was held in the spacing (break) state longer than a full word transmission time, causing that data to be discarded. A rising count indicates the async HDLC link is experiencing break conditions, often from a disconnected line, modem hangup, or intentional break signal from the remote end. For example, an admin seeing this counter increase right before a dial-up HDLC session drops would treat it as an early indicator of link disconnection.