This attribute specifies the Trunk protocol idle time out duration in
units of seconds. If the local Trunk does not receive any packets
from the link for the period specified by this attribute, the Trunk
enters Are You There (AYT) mode for up to two seconds. If the
Trunk does not receive any packets from the remote during the AYT
mode it will restage; otherwise, it exits AYT mode and continues to
provide service.