Cisco 2651XM Hardware Installation Guide - Page 45
-K/Switched-56-kbps DSU/CSU Connections, Specification, High-Capacitance Cable
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Chapter 2 Preparing to Install the Router Preparing to Connect to a Network Table 2-5 ISDN-BRI Cable Specifications Specification Resistance (at 96 kHz) Capacitance (at 1 kHz) Impedance (at 96 kHz) Wire diameter Distance limitation 1. nF = nanoFarad High-Capacitance Cable Low-Capacitance Cable 160 ohms/km 120 nF1/km 160 ohms/km 30 nF/km 75 ohms 150 ohms 0.024 in. (0.6 mm) 0.024 in. (0.6 mm) 32.8 ft (10 m) 32.8 ft (10 m) 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. OL-2171-06 Cisco 2600 Series Routers Hardware Installation Guide 2-13