Ethernet Connections; Isdn Bri Connections; Ports And Cabling - Cisco CISCO1841 - 1841 Integrated Services Router Hardware Installation Manual

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:
•
•
See the
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.
lists the specifications for ISDN BRI cables. Also, see the
Specifications
Table 4-1
Specification
Resistance (at 96 kHz)
Capacitance (at 1 kHz)
Impedance (at 96 kHz)
Wire diameter
Distance limitation
1. nF = nanofarad

Ports and Cabling

Table 4-2
The connections summarized in
•
•
•
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
4-4
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).
Cisco Modular Access Router Cable Specifications
online document for pinouts. This document is located on Cisco.com.
ISDN BRI Cable Specifications
High-Capacitance Cable
160 ohm/km
120 nF
75 ohm
0.024 in. (0.6 mm)
32.8 ft (10 m)
summarizes WAN and LAN connections for Cisco 1800 series fixed-configuration routers.
Cisco Modular Access Router Cable Specifications
Cisco Network Modules Hardware Installation Guide
Cisco Interface Cards Hardware Installation Guide
Chapter 4
Low-Capacitance Cable
160 ohm/km
1
/km 30 nF/km
150 ohm
0.024 in. (0.6 mm)
32.8 ft (10 m)
Table 4-2 are also described in detail in the following documents:
Power, Cable, and Antenna Connection Procedures
online document for information about
Cisco Modular Access Router Cable
Table 4-1
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