2-13
Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-02
Chapter 2 Preparing to Install the Router
Preparing to Connect to a Network
Use a BRI cable (not included) to connect the BRI WAN interface card directly to an ISDN.
Table 2-4
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.
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
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)