Operational state of the ring coupling configuration. slaveCouplingLinkError(2) indicates that the coupling link is not connected with the coupling port of the slave but with another port of the slave. In case of outband control additional failures can be detected: slaveControlLinkError(3) indicates that the control port of the slave has either no link or the link fails. masterControlLinkError(4) indicates that the control link is not connected with the control port of the master but with another port of the master. twoSlaves(5) is returned when two slaves are connected by the control line. localPartnerLinkError(6) indicates that the partner coupling link is not connected with the partner port of the slave but with another port of the slave in local control mode. localInvalidCouplingPort(7) indicates that in local mode the coupling line is connected to another switch and not on the same switch like the partner line. couplingPortNotAvailable(8), controlPortNotAvailable(9) and partnerPortNotAvailable(10) indicate that this port is not available because the module related to this port is not available or the port does not exist on this module.