Devices which support this feature allow write for enabling or disabling the feature. Some of the 2-port devices which are capable of remote management of a similiar device support this feature. This is typically supported by devices which support 'tnSysTransparentLPT'. Selective Link pass through when enabled monitors the link status of one port on device A, any change in its operational state is passed on to the device's other port to bring down its link and vice-versa. It is similiar to 'tnSysLinkPassThro' except it only works in one direction from Port 1 to Port 2 or Port 2 to Port 1 not both directions.