Response Modes

Both asynchronous disconnect mode (ADM) and asynchronous balanced mode extended (ABME) are supported.

ADM is the default whenever a link session is initiated and is switched to ABME only after the set asynchronous balanced mode extended (SABME) command sequence is complete. Once operating in the ABME command mode, information frames containing user data can be transferred. The ABME command mode then remains active until the LLC session terminates, which occurs due to either the disconnect (DISC) command packet sequence or a major link error.