Installing the PowerConnect Device 41
Table 3-4. Ports, Connectors and Cables
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
Port Default Settings
The general information for configuring the device ports includes the short description of the auto-
negotiation 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.
Connector Port/Interface Cable
RJ-45 10/100/1000BaseT Port Cat.5
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-
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