Ethernet Port

The iBook computer has a built-in 10/100 Mbps Ethernet port. The user can connect it to either a 10Base-T or a 100Base-TX hub; the port will automatically sense which type of hub is connected.

The connector for the Ethernet port is a shielded RJ-45 connector near the left rear corner of the computer. Table 3-3 shows the signals and pins on the connector.

Note

The RJ-45 Ethernet connector is designed so that an RJ-11 connector cannot be inserted into it.

Table 3-3 Signals on the Ethernet connector

Pin	Signal name	Signal definition
1	TXP	Transmit (positive lead)
2	TXN	Transmit (negative lead)
3	RXP	Receive (positive lead)
4	-	Not used
5	-	Not used
6	RXN	Receive (negative lead)
7	-	Not used
8	-	Not used

When connecting two computers using Ethernet, a crossover cable is not required; circuits in the PHY detect the type of connection and switch the signal configuration as required.

The Ethernet interface in the iBook computer conforms to the ISO/IEC 802.3 specification, where applicable.