EXFO FTB-8500 Series for FTB-500 - Manual (Page 157)

Port Tabs
Ethernet and Fibre Channel Application 143
Interface Setup (Ethernet)
Status

Link: A green Link LED indicates that there is a link at the input port of
the corresponding Ethernet interface. A grey LED indicates that there is
no link at the input port of the corresponding Ethernet interface.

Auto-Negotiation: Indicates the auto-negotiation status (Not available
on FTB-8510G).
“- -” indicates that the auto-negotiation process is not enabled.
Negotiating: indicates that the auto-negotiation process is running and
not completed yet.
Completed: indicates that the auto-negotiation process has been
completed successfully.
Parallel Detect Fail: indicates that the auto-negotiation has failed
through the parallel detection process while negotiating in
10/100Base-T.