Perle Systems CM-1000MM-XXXXXX, C-1000MM-XXXXXX manual Link Mode Switch, Fiber Fault Alert Switch

Link Mode (Switch 2)

Switch Position	Mode
Up (default)	Smart Link Pass-Through Mode
Down	Standard Mode

Smart Link Pass-Through:In 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.

Standard Mode: In this mode the links can be brought up and down independently of each other. A loss of link on either fiber connection can occur without affecting the other connection.

Fiber Fault Alert (Switch 3)

Switch Position	Mode
Up (default)	Enabled
Down	Disabled

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

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

Disabled: The media converter module will not monitor for fiber fault.

Note: This feature is not required; if Fiber negotiation has been enabled since link negotiation accomplishes the same thing. When Fiber Negotiation is enabled this switch is ignored.

Gigabit Fiber to Fiber Media Converter Module – Installation Guide

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