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Maximum wiring distances are shown in the table below.
Table 3-2. Wiring Distances
Media Type Size Data Rate Max Distance
57.6 kbps 2,100m
0.2 mm
2
unscreened
twisted pair
9.6 kbps 3,600m
57.6 kbps 3,000m
Wired
0.8 mm
2
screened twisted
pair
9.6 kbps 5,200m
50/125 um
(4dB/km loss)
3,000m
50/125 um
(3dB/km loss)
57.6 or 9.6 kbps
4,500m
62.5/125 um
(4dB/km loss)
4,000m
Optical Fiber
62.5/125 um
(3.75dB/km loss)
57.6 or 9.6 kbps
4,600m
Notes:
• 0.8 mm
2
fire-rated screened twisted pair cable must not have more than 190nF/km
capacitance or 21Ω/km resistance.
• 0.2 mm
2
unshielded twisted-pair telephone cable must not have more than 72nF/km
capacitance or 84Ω/km resistance.
• Between any two connected network nodes, L+ of one node connects to R+ of the
other, and L- connects to R-.
Continued on next page
Step 4. Wiring Network Cards, Continued
Wiring Distances