Preparing to Install the Router 2-23
56K/Switched-56-kbps DSU/CSU Connections
For more information on BRI WAN interface cards, see the publication Cisco WAN
Interface Cards Hardware Installation Guide.
56K/Switched-56-kbps DSU/CSU Connections
Switched-56-kbps connections are provided by the 56-kbps DSU/CSU WAN
interface card.
For more information on Switched-56-kbps WAN interface cards, see the publication
Cisco WAN Interface Cards Hardware Installation Guide included in your router package.
Table 2-3 ISDN BRI Cable Specifications
Specification High-Capacitance Cable Low-Capacitance Cable
Resistance (at 96 kHz) 160 ohms/km 160 ohms/km
Capacitance (at 1 kHz) 120 nF
1
/km
1 nF = nanoFarad.
30 nF/km
Impedance (at 96 kHz) 75 ohms 150 ohms
Wire diameter 0.024" (0.6 mm) 0.024" (0.6 mm)
Distance limitation 32.8' (10 m) 32.8' (10 m)
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