COMMAND ADDRESS Address the local station uses when sending command frames to the remote station. MAINTENANCE MODE Whether the station is in maintenance mode. When set to true, the station will be used exclusively for maintenance operations. When set to false, the station operates in normal fashion. The limit command sets the value of this attribute to true, and the unlimit to false. PROTOCOL STATE State of the data link protocol. ERROR - A protocol error occurred. For instance, the logical station received an invalid frame. HALTED - The protocol could not start. For example, there is no client. INITIALIZING - The protocol is being initialized. INOPERATIVE - The protocol cannot be started because no contact has been established with the remote station. MAINTENANCE - The logical station is in maintenance mode. RESETTING - The protocol is resetting after an error. RUNNING - The protocol is running and capable of exchanging frames with the remote station. REMOTE VERSION Version number of the HDLC protocol that the remote station is using. This is received as part of an XID message from the remote station. STATE State of the logical station. OFF - The logical station is off because of a disable command. ON - The logical station is on because of an enable command.