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Cisco 3600 Series Routers Hardware Installation Guide
OL-2056-05
Chapter 2 Preparing to Install the Router
Preparing to Connect to a Network
For more information on BRI WAN interface cards, refer to the Cisco Interface Cards Installation Guide
online document. This document is located on Cisco.com and the Documentation CD-ROM.
56-K/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, refer to the Cisco Interface Cards
Installation Guide online document. This document is located on Cisco.com and the Documentation
CD-ROM.
Table 2-4 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 in. (0.6 mm) 0.024 in. (0.6 mm)
Distance limitation 32.8 ft (10 m) 32.8 ft (10 m)