Finisar Surveyor manual Establishing Links for THGm

Surveyor

User’s Guide

Establishing Links for THGm

The THGm is often connected to a device that cannot auto negotiate the connection, such as when monitoring/analyzing a connection through a tap device. The device will automatically go through a sequence of attempts to disable auto negotiation and establish a link with a device that cannot auto negotiate. However, if a link cannot be automatically established with a device, you can attempt to establish a link manually by disabling auto negotiation mode. The Fiber Link option from the Module menu allows you to disable auto negotiation and alert the module to begin listening for data. Make sure the No Auto Negotiation item is selected from the menu. Auto negotiation enabled is the default value.

The Module menu also has a Fiber Link → Link Status option which provides information about a 1000 Mbps link. If the carrier wave is present, this option returns a “link OK” message. If there is a problem with the link, a message screen appears with diagnostic information that may help you troubleshoot the link.

The “link OK” message is returned if the device can sense the carrier wave on its receive port. However, if a THGm has a proper physical connection to a device that cannot auto negotiate the connection, this option will report that the link is OK even though the devices do not recognize each other. The Link Status option is of limited use when connecting to devices such as taps where the problem is an auto negotiation failure.

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