User manual

12
Troubles shooting
 Check the configuration DIP-switch. It must be setting in the same operation
mode with the link partner.
 Select the proper Copper/Fiber cable to construct your network. The single-mode
converter must use single-mode fiber cable. Please check that you are using the
right cable.
 Don’t both use multi-mode and single mode.
 Link loss Forwarding problem :
When using a mixture of GVT-4000 / 4001 Hardware versions 1 and 2, please
note the differences in the dip switches.
(1) GVT-4000/4001 Hardware version 1
S/W No Status Description
1
ON Fiber in 1000Mbps Full Duplex
OFF Fiber Auto-Negotiation
2
ON UTP LLF Enable
OFF UTP LLF Disable
3
ON Fiber LLF Enable
OFF Fiber LLF Disable
(2) GVT-4000/4001 Hardware version 2
S/W No Status Description
1
ON LLF Enable
OFF LLF Disable
2
ON Pure converter mode
OFF Switch converter mode
3
ON Reserved
OFF Reserved
For GVT-4000 / 4001 Hardware version 1, please ensure that either dip 2, or dip 3
are set to ON, and not both at the same time.