Sun Microsystems SunSwift SPARCserver 1000, Installation Manual, Page: 28 / 70

1-14 SPARCserver 1000 System Installation Manual—June 1996
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External peripherals
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Monitor used for diagnostics
1.6.2 Preparing the Ethernet Network
The SPARCserver 1000 system follows the IEEE standard for
10Base-T Ethernet, which is also known as twisted-pair Ethernet.
Under this standard two pairs of unshielded wires connect to each node (a
workstation or file server). One pair of wires transmits, and the other pair
receives. Both wire-pairs are contained in a single flat cable that is
approximately 50 percent wider than a modular telephone cable. Twisted-pair
cables used with Sun Microsystems® products have RJ-45 connectors, which
resemble the smaller RJ-11 connectors used for modular telephone cables.
A computer using twisted-pair cable does not connect directly to the network.
The twisted-pair cable connects the computer to a hardware interface called a
hub (also known as a repeater, concentrator, gateway, or bridge). The hub
connects by a second cable (a coaxial or other cable) to the network. Single-
connection and multiple-connection hubs are available commercially.
For twisted-pair cable length, refer to Chapter 2, Table 2-1.
Figure 1-8 summarizes the implementation of twisted-pair Ethernet.
Figure 1-8 Example of 10Base-T (Twisted-Pair) Ethernet
Network cable
Tap
Coaxial cable or
optical fiber
Server
Twisted-pair cable
Concentrator hub
Work station
Concentrator hub
Tap