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S14 Convenient Switches Installation and User Guide (09/04)
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An address-aging algorithm causes least-used addresses to fall out in favor of new
frequently-used addresses. To reset the address buffer, cycle power down-and-up.
4.2 Auto-cross (MDIX),Auto-negotiation and Speed-sensing
All the four RJ-45 ports independently support auto-cross (MDIX) in auto-
negotiation mode for speed in 10BASE-T and 100BASE-TX modes. The MDIX does the
auto-cross only under the Auto-negotiation mode, and will not take effect if the port is
fixed. Operation is according to the IEEE 802.3u standard.
When a RJ-45 cable connection is made, and each time a LINK is enabled, auto-
negotiation takes place. The P80F or P80C advertises its capability for 10 or 100 Mbps
speed, and the device at the other end of the cable should similarly advertise / respond and
both sides will agree to the speed being used. Depending upon the device connected, this
will result in agreement to operate at either 10 Mbps or 100Mbps speed.