Cisco 1721 - Manual (Page 66)

Appendix B Cabling Specifications
Ethernet Network Cabling Guidelines
B-2
Cisco 1721 Router Hardware Installation Guide
78-13834-02
Ethernet Network Cabling Guidelines
Table B-2 describes some guidelines for creating Ethernet networks. Figures
might vary, depending on the manufacturer of the network equipment.
3 RX+ <— 3
6 RX– <— 6
1. Pins 4, 5, 7, and 8 are not used for signaling.
Table B-1 Ethernet Cable Pinouts (continued)
RJ-45
Pin
1
Signal Direction
RJ-45
Pin
Table B-2 Ethernet Cabling Guidelines
Specification 10BASE-T 100BASE-TX
Maximum segment
length 100 meters 100 meters
Maximum number of
segments per network 5 • With Class I
repeaters: 1
• With Class II
repeaters: 2
Maximum hop count
1
1. Hop count = Routing metric used to measure the distance between a source and a destination.
4 • With Class I
repeaters: none
• With Class II
repeaters: 1
Maximum number of
nodes per segment 1024 1024
Cable type required UTP
Category 3, 4, or 5 UTP Category 5 or STP