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OCR: 100BASEX CONVERGENCE SUBLAYER Ethernet MAC 100Mbps, Start/Stop, Half Duplex A A Receive MAC ironsmit MAC Carrier Sense Transmit Enable Receive Error Collision Detect Convergence Sublayer Receive PMD Signal Detect Transmit PMD 125Mbps Continuous Full Duplex FDDI PMD FIGURE 3: 100BaseX's convergence sublayer maps the FDDI physical layer's continuous signaling to the start- stop, half-duplex Ethernet MAC