Specifications

3-11
Step 4. Wiring Network Cards, Continued
Maximum wiring distances are shown in Table 3-2.
Table 3-2. Wiring Distances
Media Type Size Data Rate Max Distance
Wired
0.2 mm
2
unscreened
twisted pair
57.6 kbps 2,100m
9.6 kbps 3,600m
0.8 mm
2
screened twisted
pair
57.6 kbps 3,000m
9.6 kbps 5,200m
Optical Fibre
50/125 um
(4dB/km loss)
57.6 or 9.6 kbps
3,000m
50/125 um
(3dB/km loss)
4,500m
62.5/125 um
(4dB/km loss)
57.6 or 9.6 kbps
4,000m
62.5/125 um
(3.75dB/km loss)
4,600m
Notes:
 0.8 mm
2
fire-rated screened twisted pair cable must not have more than 190nF/km
capacitance or 21/km resistance.
 0.2 mm
2
unshielded twisted-pair telephone cable must not have more than 72nF/km
capacitance or 84/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
Wiring Distances