Nortel Networks 70 Series - Manual (Page 53)

206375-A B-1
Appendix B
Cables and Connectors
This appendix provides specifications for cables and connectors used for the
BayStack 70 Series 10/100 Ethernet Switch.
10BASE-T/100BASE-TX UTP Cable
For 10BASE-T and 100BASE-TX connections, use Category 5, 8-wire unshielded
twisted pair cable. Configure your network according to the following guidelines:
• Use a maximum segment length of 100 meters.
• Use an 8-pin modular plug (RJ-45).
Table B-1 shows the RJ-45 connector pin assignments for MDI-X and MDI ports.
Table B-1. RJ-45 Connector Pin Assignments
RJ-45
10BASE-T/100BASE-TX
Ethernet Port
Pin
10BASE-T MDI-X
(Normal) Port 100 BASE-TX
MDI-X Port
MDI
(Uplink)
Port
1 RX+ (Receive) RX+ TX+
2 RX- (Receive) RX- TX-
3 TX+ (Transmit) TX+ RX+
4 Not used Common-Mode
Terminated (CMT)
5 Not used CMT
6 TX- (Transmit) TX- RX-
7 Not used CMT
8 Not used CMT
1882.6
8
1
1
8