ZyXEL MC100FX-SC30-A User Guide - Page 19

MC100FX-SC2/30-A User's Guide DIP Switches DIP 1 Enables / disables auto-negotiation (RJ-45) DIP 2 Copper port (RJ-45) duplex mode: full- or half-duplex DIP 3 Copper port (RJ-45) data bit rate: 10Mbps or 100Mbps DIP 4 Fiber port duplex mode: full-duplex or half-duplex DIP 5 Enables / disables Link Fault Signaling(LFS) DIP 6 Enables / disables Local Loop-back (LLB) DIP 7 Enables / disables Remote Loop-back (RLB) Loop-back Testing This Converter features DIP switches for activating local and remote loop-back diagnostic test functions. Use local loop-back to check if the copper segment is connected properly, and use remote loop-back to check if the fiber segment is connected properly. Please see the figure below: Dip Switch 6 ON: enables local loop back function OFF: disables local loop back function Dip Switch 7 ON: enables remote loop back function OFF: disables remote loop back function 8