Installing the PowerConnect Device 35Table 3-1. Ports, Connectors and CablesThe RJ-45pin number allocation for the 10/100/1000BaseT ports is listed in the table following.Table 3-2. RJ-45 Pin Number Allocation for 10/100/1000BaseT Ethernet PortPort Default SettingsThe general information for configuring the device ports includes the short description of the auto-negotiation mechanism and the default settings for switching ports.Auto-NegotiationAuto-negotiation enables automatic detection of speed, duplex mode and flow control on switching10/100/1000BaseT 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 itstransmission rate, duplex mode and flow control (the flow control by default is disabled) abilities to itspartner. 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 deviceswitching 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 portthat is configured to full duplex, the auto-negotiation results in the station attempting to operate in halfduplex.Connector Port/Interface CableRJ-45 10/100/1000BaseT Port Cat.5Pin No Function1 TxRx 1+2 TxRx 1-3 TxRx 2+4 TxRx 2-5 TxRx 3+6 TxRx 3-7 TxRx 4+8 TxRx 4-
