Cisco 1721 - Manual (Page 65)

B-1
Cisco 1721 Router Hardware Installation Guide
78-13834-02
A P P E N D I X
B
Cabling Specifications
This appendix describes cables and cabling guidelines for the Cisco 1721 router
and contains the following sections:
• Ethernet Cables
• Ethernet Network Cabling Guidelines
• Console Cable and Adapter
Note For information about cables used with Cisco WICs, refer to the Cisco WAN
Interface Cards Hardware Installation Guide, which comes with each card.
Ethernet Cables
This section describes the Ethernet cables that are used to connect the router to
your local Ethernet network. A 10/100BASE-TX router, such as the Cisco 1721
router, requires Category 5 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable.
Table B-1 gives the pinouts for an Ethernet cable.
Table B-1 Ethernet Cable Pinouts
RJ-45
Pin
1
Signal Direction
RJ-45
Pin
1 TX+ —> 1
2 TX– —> 2