Perle Systems S-1110DP, S-1110PP manual Fiber Fault Alert Switch, Switch Position Fiber Port

of link on either the fiber or copper port can occur without affecting the other connection.

Smart Link Pass-ThroughIn this mode, the link state on one connection is directly reflected through the media converter to the other connection. If link is lost on one of the connections, then the other link will be brought down by the media converter.

If the media converter has 2 copper or 2 fiber connections, then both must go down in order to affect the other connection(s).

If the installation has a media converter on both ends of the fiber link and both are set-up for Smart Link Pass-Through, then a loss of copper link on the far end device will propagate through both media converters and will result in a loss of link at the near end device.

Fiber Fault Alert (Switch 3)

Switch Position	Fiber Port 1	Fiber Port 2
Up (default)	Enabled	Enabled
Down	Disabled	Enabled

Enabled: If the media converter detects a loss of signal on the fiber receiver, it will immediately disable its fiber transmitter signal on the same port. This, in effect, notifies the fiber link partner that an error condition exists on the fiber connection.

If the remote media converter is set up for Fiber Fault Alert (FFA) and the local media converter is set up with Link Pass-Through, a loss of fiber link on either the transmit or receive line will be passed through to the local copper connection thus notifying the connected device.

If the media converter has been set to Smart Link Pass-Through mode, the effect will be the same as FFA, since the link loss on the fiber receiver will result in bringing down the copper link, which will in turn cause the transmit fiber link to be brought down.

Note: This feature only takes effect if Fiber Negotiation has been turned off.

Disabled: The media converter will not monitor for or generate Fiber Fault Alert.

10	Perle PoE/PoE+ 10/100/1000 Ethernet Media Converter
	Installation Guide