Transition Networks
SGFEB 10/100/1000 Bridging Media Converter User Guide
33601 Rev. D
Page 13 of 25
AutoCross™
The AutoCross feature allows either straight-through (MDI) or crossover (MDI-X) cables to be used when
connecting to devices such as hubs, transceivers, or network interface cards (NICs). AutoCross
determines the characteristics of the cable connection and automatically configures the unit to link up,
regardless of the cable configuration.
Automatic Link Restoration
The SGFEB
will automatically restore the link between networked devices after a fault condition has been
corrected. In contrast, products from competitors generally require the user to power down, then power
up the converters after a fault condition has been corrected.
Far End Fault (FEF)
The FEF feature applies to IEEE 802.3u 100Mbit Cu/Fiber rate only. The MAC may use FEF when Auto
negotiation is disabled. When the MAC detects a PHY fault/TX loss link, a FEFI idle pattern is sent to the
link partner TX (100BASE-FX only).
Remote Fault Detect (RFD)
The RFD feature applies to 1000Mbps operation only. Remote Fault Detect (RFD) is a troubleshooting
feature found on GigEthernet copper-to-fiber media converters. By enabling RFD on the remotely located
media converter, the status of the fiber link will be monitored and any link failures will be reported back to
the local converter. Should the remote converter lose its fiber RX signal, RFD will force the converter to
shut down its fiber TX port. If Link Pass Though is enabled on both ends, then the copper ports will also
be shut down to notify both end devices of the link failure.
Fiber Redundancy (Revertive / Non-revertive)
Multiport versions provide 3 or 4 port switch functionality or provide redundant fiber links, with a
switchover (failover) time of less than 1 second. In
Revertive
mode, after the failed link is recovered, it
becomes the active link again (reverts to the failed link). In
Non-revertive
mode, after the failed link is
recovered, the failed link does not become active again.
The 4 port version does not support Fiber
Redundancy mode but does support port isolation.
New Features
1. Jumbo 10K frame support
2. 8k MAC addresses (vs 1k)
3. EEE 802.3az
4. Multi-port mode default for multiple SFP assemblies.
