MC1000-SFP User’s Guide
19
PROBLEM
POSSIBLE CAUSES AND REMEDIES
The
LNK/ACT
(Ethernet) LED
is off
Check the Ethernet cable connection between the
media converter and the Ethernet device. The distance
between them should not be more than 100 meters
Check for faulty Ethernet cables.
Check that the Ethernet device supports auto-
negotiating at half/full duplex and 100/1000MBps
speed.
If Link Loss Forwarding is enabled on the fiber port
(DIP switch 3), then check if the fiber link is down
(thereby forcing the Ethernet link down).
The
FDX/COL
(Ethernet) LED
is off
The RJ-45 port is operating in half-duplex mode or the
Ethernet link is down. See the preceding for possible
causes and remedies.
The
LNK/ACT
(Fiber) LED is
off
Check the fiber cable connection between the media
converter and the remote device. Check that the
distance between them does not exceed limits for
single mode or multi mode fiber.
Check for faulty cables.
If the remote device does not support auto-negotiating,
but does support full duplex, 1000MBps speed, then
turn on DIP switch 1.
If Link Loss Forwarding is enabled on the Ethernet port
(DIP switch 2), then check if the Ethernet link is down
(thereby forcing the fiber link down).
The
FDX/COL
(Fiber) LED is
off
The fiber port is operating in half-duplex mode or the
fiber link is down. See the preceding for possible
causes and remedies.
