This attribute is the most recent A-bit status sent to the interface.
The A-bit status is part of the LMI protocol, and indicates
willingness to accept data from the local interface.
inactive - the Frame Relay service discards all data offered from the
local interface.
active - the Frame Relay service tries to process all data offered
from the local interface.
notApplicable - the DLCI is switched, so this attribute is ignored.