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Cisco 1721 - VPN Security Router Bundle Hardware Installation Manual page 66

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

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