Appendix A - Technical Reference

ETHERNET PORT

The following table lists the 10/100Base-T interface data signals for both MDI and MDI-X port selection. By selecting the correct position, you can always use a straight-through cable.

MDI Pin (*)

MDI-X Pin

Signal

Description

1

3

TD+

Transmit Data (+)

2

6

TD-

Transmit Data (-)

3

1

RD+

Receive Data (+)

44

55

6

2

RD-

Receive Data (-)

77

88

(*)A 10/100Base-T port on a PC is always configured as an MDI port.

STANDARDS

 

ISO/IEC/IEEE

 

 

Document Number

Description

 

 

ISO/IEC 8802-3: 1993 (E)

Information technology - Local and metropolitan area

ANSI/IEEE Std 802.3, 1993

networks – Part3: Carrier sense multiple access with

Edition

collision detection (CSMA/CD) access method and physical

 

layer specifications

 

 

ISO/IEC 10038: 1993 (E)

Information technology – Telecommunications and

ANSI/IEEE Std 802.1D, 1993

information exchange between systems – Local area

Edition

networks – Media access control (MAC) bridges

 

 

Digital, Intel, and Xerox Blue

The Ethernet – A Local Area Network, data-link layer and

Book, 1982

physical layer specifications, Version 2.0

Campus-REX2 RS Interface Card User Manual

141