Cisco CISCO1841 - 1841 Integrated Services Router User Manual

4-4
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
OL-6425-03
Chapter 4 Power, Cable, and Antenna Connection Procedures
Connecting WAN and LAN Cables
Ethernet Connections
The IEEE has established Ethernet as standard IEEE 802.3. The Cisco 1800 series fixed-configuration
routers support the following Ethernet implementations:
• 100BASE-T—100-Mbps full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable. Supports the Ethernet maximum length of 328
feet (100 meters).
• 10BASE-T—10-Mbps full-duplex transmission over a Category 5 or better unshielded twisted-pair
(UTP) cable. Supports the Ethernet maximum length of 328
feet (100 meters).
See the Cisco Modular Access Router Cable Specifications online document for information about
Ethernet cables, connectors, and pinouts.
ISDN BRI Connections
The ISDN BRI S/T interface on the Cisco 1801, Cisco 1802, Cisco 1803 and Cisco 1812 routers provides
an ISDN BRI connection for dial-backup purposes. The BRI S/T interface requires an external Network
Terminator 1 (NT1).
Use a BRI cable (not included) to connect the BRI S/T interface card directly to an ISDN NT1. Table 4-1
lists the specifications for ISDN BRI cables. Also, see the Cisco Modular Access Router Cable
Specifications online document for pinouts. This document is located on Cisco.com.
Ports and Cabling
Table 4-2 summarizes WAN and LAN connections for Cisco 1800 series fixed-configuration routers.
The connections summarized in Table 4-2 are also described in detail in the following documents:
• Cisco Modular Access Router Cable Specifications
• Cisco Network Modules Hardware Installation Guide
• Cisco Interface Cards Hardware Installation Guide
Ta b l e 4-1 ISDN BRI Cable Specifications
Specification High-Capacitance Cable Low-Capacitance Cable
Resistance (at 96 kHz) 160 ohm/km 160 ohm/km
Capacitance (at 1 kHz) 120 nF
1
/km
1. nF = nanofarad
30 nF/km
Impedance (at 96 kHz) 75 ohm 150 ohm
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)

Cisco CISCO1841 - 1841 Integrated Services Router Specifications

General

Brand	Cisco
Model	CISCO1841 - 1841 Integrated Services Router
Category	Network Router
Language	English