When this object is set to the value of open(2), the station should go into the open state. The progress and success of this command is given by the values of the object mdlIBstate. When this object is set to the value of reset(3), then the station should do a reset. On a reset, all MIB counters should retain their values, if possible. Other side effects depend on the hardware chip set. When this object is set to the value of close(4), the station should go into the closed state by removing itself from the ring. Setting this object to a value of no-op(1) has no effect. For read operation, this object has always a value of no-op(1). It is not permitted to apply this command on an agent module.