CTC Union FMUX-01, User Manual

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Chapter 2. Port Card Overview
2-7
FMUX-01Mar 2003
2.7 Ethernet Bridge Module Overview
When the MULTIPLEXER UNIT is ordered with an ET100 Port Card option, a
Single-Channel Bridge Port Card is supplied. Complete bridging functions are provided.
BRIDGE FEATURES
10BASE-T/100BASE-TX, Full Duplex or Half Duplex
HP Auto-MDIX, detects and corrects crossed cables
IEEE 802.3x flow control
Real-time filtering with 256 address tables
Automatic address learning, aged and deleted with 5 minutes
Up to 340 packet-buffering capacity
Auto padding undersize packets to meet the minimum LAN packet size requirement
Buffering modes can be selected according to the set of WAN and LAN line speeds
Automatic TP polarity correction
BRIDGE SPECIFICATIONS
Compliance : IEEE 802.3/802.3u
Connector : Shielded RJ-45
Data Rate : 10/100Mbps; Half Duplex (20/200Mbps; Full duplex)
Filtering and Forwarding : 90,000 packets/sec
Delay : 1 frame
WAN Protocol : HDLC
Filter:
When this feature is disabled (DIP1-1 OFF), all frames are passed transparently. In this
configuration, the
ET100 acts as an Ethernet repeater. When the filter is enabled (DIP-1 ON),
frame destinations are tested against the internal MAC address table. Filtering enabled is the normal
selection for Bridging.
Auto Negotiation:
When this feature is disabled (DIP1-3 ON), the LAN configuration is defined by the Duplex
(DIP-4) and Speed (DIP-5) settings. This is the preferred method of configuration, but requires the
specific knowledge of the capabilities of the device to which the bridge is connected. Failure to
make the proper Ethernet settings can result in reduced LAN performance or in worst case, no LAN
function at all. When Auto Negotiation is enabled (DIP-3 OFF), by default, the bridge will try to
determine the proper speed and duplexity of the connected device. If the negotiation fails, as it will
with a legacy device that doesn't support auto-negotiation, the settings will fallback to 10Mpbs
speed and Half Duplex for compatibility.