Technical information

CHAPTER 3
Devices and Ports
Internal Modem 47
The connector for the Ethernet port is a a short, shielded RJ-45 connector on the
back of the computer. Table 3-8 shows the signals and pins on the connector.
The Ethernet interface in this computer conforms to the ISO/IEC 802.3
specification, where applicable.
Internal Modem 3
The PowerBook G3 Series computer comes with a built-in modem. The
connector for the modem is an RJ-11 connector on the back of the computer.
The modem has the following features:
■ modem bit rates up to 56 Kbps (supports K56flex and V.90 modem
standards)
■ fax modem bit rates up to 14.4 Kbps
The modem appears to the system as a serial port that responds to the typical
AT commands. The modem provides a sound output for monitoring the
progress of the modem connection.
Table 3-8 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