Dell PowerConnect 5324 User's Guide - Page 41
Port Default Settings, Auto-Negotiation
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Table 3-4. Ports, Connectors and Cables Connector Port/Interface RJ-45 10/100/1000BaseT Port Cable Cat.5 The RJ-45pin number allocation for the 10/100/1000BaseT ports is listed in the table following. Table 3-5. RJ-45 Pin Number Allocation for 10/100/1000BaseT Ethernet Port Pin No Function 1 TxRx 1+ 2 TxRx 1- 3 TxRx 2+ 4 TxRx 2- 5 TxRx 3+ 6 TxRx 3- 7 TxRx 4+ 8 TxRx 4- Port Default Settings The general information for configuring the device ports includes the short description of the autonegotiation mechanism and the default settings for switching ports. Auto-Negotiation Auto-negotiation enables automatic detection of speed, duplex mode and flow control on switching 10/100/1000BaseT ports. Auto-negotiation is enabled per port by default. Auto-negotiation is a mechanism established between two link partners to enable a port to advertise its transmission rate, duplex mode and flow control (the flow control by default is disabled) abilities to its partner. The ports then both operate at the highest common denominator between them. If connecting a NIC that does not support auto-negotiation or is not set to auto-negotiation, both the device switching port and the NIC must be manually set to the same speed and duplex mode. If the station on the other side of the link attempts to auto-negotiate with a device 10/100/1000BaseT port that is configured to full duplex, the auto-negotiation results in the station attempting to operate in half duplex. Installing the PowerConnect Device 41