56K/Switched-56-Kbps Dsu/Csu Connections - Cisco 2600 Series Hardware Installation Manual

Chapter 2 Preparing to Install the Router
Use a BRI cable (not included) to connect the BRI WAN interface card directly to an ISDN.
lists the specifications for ISDN BRI cables. Also, refer to the Cisco Modular Access Router Cabling
Specifications online document for pinouts. This document is located on Cisco.com and the
Documentation CD-ROM that accompanied your router package.
Table 2-4
Specification
Resistance (at 96 kHz)
Capacitance (at 1 kHz)
Impedance (at 96 kHz)
Wire diameter
Distance limitation
1. nF = nanoFarad
For more information on BRI WAN interface cards, refer to the Cisco WAN Interface Cards Hardware
Installation Guide, located at: Cisco Product Documentation > Access Servers and Access Routers >
Modular Access Routers Cisco 2600 Routers > Hardware installation documents for Cisco 2600
series > Interface card installation

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, refer to the Cisco WAN Interface
Cards Hardware Installation Guide, located at: Cisco Product Documentation > Access Servers and
Access Routers > Modular Access Routers Cisco 2600 Routers > Hardware installation documents
for Cisco 2600 series > Interface card installation
OL-2171-02
ISDN BRI Cable Specifications
High-Capacitance Cable
160 ohms/km
1
120 nF /km
75 ohms
0.024 in. (0.6 mm)
32.8 ft (10 m)
Preparing to Connect to a Network
Low-Capacitance Cable
160 ohms/km
30 nF/km
150 ohms
0.024 in. (0.6 mm)
32.8 ft (10 m)
Cisco 2600 Series Routers Hardware Installation Guide
Table 2-4
2-13