Apple 17-INCH manual Internal Modem, Rxn

CHAPTER 3

Devices and Ports

Pin	Signal name		Signal definition
4	–		Not used
5	–		Not used
6	RXN		Receive (negative lead)
7	–		Not used
8	–		Not used
Table 3-5		Signals for 1000Base-T operation
Pin	Signal name		Signal definition
1	TRD+(0)		Transmit and receive data 0 (positive lead)
2	TRD–(0)		Transmit and receive data 0 (negative lead)
3	TRD+(1)		Transmit and receive data 1 (positive lead)
4	TRD+(2)		Transmit and receive data 2 (positive lead)
5	TRD–(2)		Transmit and receive data 2 (negative lead)
6	TRD–(1)		Transmit and receive data 1 (negative lead)
7	TRD+(3)		Transmit and receive data 3 (positive lead)
8	TRD–(3)		Transmit and receive data 3 (negative lead)

To interconnect two computers for 1000Base-T operation, you must use 4-pair cable (Category 5 or 6).

The Ethernet port on the PowerBook G4 17-inch computer supports Auto-MDIX. It switches between MDI (Medium Dependent Interface) and MDI-X operation automatically, so it can be connected to another device by either a straight-through cable or a cross-over cable.

The Ethernet interface in the PowerBook G4 17-inch computer conforms to the ISO/IEC 802.3 specification, where applicable, and complies with IEEE specifications 802.3i (10Base-T), 802.3u-1995 (100Base-T), and 802.3ab (1000Base-T).

Internal Modem

The PowerBook G4 17-inch computer comes with a built-in modem. The connector for the modem is an RJ-11 connector on the left side of the computer.

The modem has the following features:

●modem bit rates up to 56 Kbps (supports V.34, V.90, and V.92 modem standards)

30Internal Modem

Legacy Document 2003-03-01 © 2003 Apple Computer, Inc. All Rights Reserved.