DGS-3130 Series Layer 3 Stackable Managed Switch Hardware Installation Guide 
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Appendix B - Cables and Connectors 
Ethernet Cable 
When connecting the Switch to another switch, a bridge or hub, a straight-through Cat5/5e/6a/7 cable is necessary. 
Please review these products for matching cable pin assignment. 
 
The following diagrams and tables show the standard RJ45 receptacle/connector and their pin assignments. 
 
 
Figure B-1 Standard RJ45 port and connector 
 
RJ45 Pin Assignment 
Contact  MDI-X Port  MDI-II Port 
1  RD+ (receive)  TD+ (transmit) 
2  RD - (receive)  TD - (transmit) 
3  TD+ (transmit)  RD+ (receive) 
4  1000BASE-T  1000BASE-T 
5  1000BASE-T  1000BASE-T 
6  TD - (transmit)  RD - (receive) 
7  1000BASE-T  1000BASE-T 
8  1000BASE-T  1000BASE-T