8
SGFEB10xx-12x
24-Hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
Operation
Status LEDs
Use the status LEDs to monitor the media converter operation in the network.
Fiber status LEDs
The status LEDs for the 1000Base-SX/LX fiber connection (labeled LACT and
PWR) are located next to the fiber port (Port 2).
PWR: Power ON = Connection to external
AC power.
LACT: Link activity ON = A link has been
established for the fiber
connection.
Flashing = The fiber
connection is
transmitting or receiving data.
Copper status LEDs
The status LEDs for the copper connection are integrated into the RJ-45 port. These
LEDs are not labeled on the media converter. See drawing below.
Duplex/Link:
Orange A link in half-duplex mode has been established for
the copper connection.
Flashing Orange The copper connection is transmitting/receiving data
in half-duplex mode.
Green A link in full-duplex mode has been established for
the copper connection.
Flashing Green The copper connection is transmitting/receiving data
in full-duplex mode.
Speed:
OFF 10 Mb/s operation.
Orange 100 Mb/s operation.
Green 1000 Mb/s operation.
10/100/1000BaseT
Duplex/Link Speed
1000Base
TX
PWR
LACT
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9
SGFEB10xx-12x
Operation—continued
Product features
Auto-Negotiation
The Auto-Negotiation feature allows the SGFEB10xx-12x. media converter to
automatically configure itself to achieve the best possible mode of operation over a
link. The media converter broadcasts its speed (10 Mb/s, 100 Mb/s, or 1000 Mb/s)
and duplex capabilities (full or half) to the other devices and negotiates the best
mode of operation. Auto-Negotiation allows quick and easy installation because the
optimal link is established automatically. No user intervention is required to
determine the best mode of operation.
A scenario where the media converter is linked to a non-negotiating device is a case
where the user may want to disable Auto-Negotiation. In this instance, the mode of
operation will drop to the least common denominator between the two devices (e.g.
100 Mb/s, half-duplex). Disabling this feature gives the user the ability to force the
connection to the best mode of operation.
Note: The xGFEB10xx-12x supports 1000 Mb/s fiber Auto-Negotiation.
Link Pass-Through
The Link Pass-Through feature allows the media converter to monitor both the fiber
and copper RX (receive) ports for loss of signal. In the event of a loss of an RX
signal (1), the media converter will automatically disable the TX (transmit) signal
(2), thus, “passing through” the link loss (3). The far-end device is automatically
notified of the link loss (4), which prevents the loss of valuable data unknowingly
transmitted over an invalid link.
Full-Duplex Network
In a full-duplex network, maximum cable lengths are determined by the type of
cables that are used. See pages 1 and 2 for the cable specifications for the different
SGFEB1xxx-1xx. models.
The 512-Bit Rule does not apply in a full-duplex network.
3
1
Local
Media
Converter
Remote
Media
Converter
Near-End
Device
Far-End
Device
original fault on the
Ethernet copper link
remote converter disables
the Ethernet copper link
local converter sends a
loss signal over the fiber link
2
fiber link is still valid
4
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