Chapter 5 Cable Information and Specifications for Cisco 1800 Series Routers (Modular)

Preparing to Connect to a Network

ISDN BRI Connections

The BRI WICs provide ISDN and BRI connections. BRI WICs are available with either an S/T interface that requires an external Network Termination 1 (NT1), or a U interface that has a built-in NT1. You can install the BRI WICs in any available WIC slots in the chassis.

Warning The ISDN connection is regarded as a source of voltage that should be inaccessible to user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided equipment or connection hardware. Any hardwired connection (other than by a nonremovable, connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers. Statement 23

Warning Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach the end away from the unit first. Statement 1026

Use a BRI cable (not included) to connect the BRI WIC directly to an ISDN. Table 5-3lists the specifications for ISDN BRI cables. For information about pinouts, see Cisco Modular Access Router Cable Specifications.

Table 5-3

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 nF1/km

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)

 

 

 

 

1. nF = nanofarad.

For more information on BRI WICs, see Installing Cisco Interface Cards in Cisco Access Routers.

CSU/DSU Connections

CSU/DSU WICs are available that provide switched 56-kbps connections, or full or fractionalized T1 connections.

For more information on CSU/DSU WICs, see Installing Cisco Interface Cards in Cisco Access Routers.

Cisco 1800 Series Routers (Modular) Hardware Installation Guide

 

OL-5876-03

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Cisco Systems CISCO1841-HSEC/K9-RF manual Isdn BRI Connections, CSU/DSU Connections, Low-Capacitance Cable

CISCO1841-HSEC/K9-RF specifications

The Cisco Systems CISCO1841-HSEC/K9-RF is a versatile and robust router designed to meet the demands of small to medium-sized businesses and branch offices. This model is part of the Cisco 1800 Series Integrated Services Routers, which are known for their performance, security features, and scalability, making them ideal for organizations seeking to enhance their network infrastructure.

One of the main features of the CISCO1841-HSEC/K9 is its modular architecture. This design allows businesses to customize and expand their networks according to changing needs by adding various modules and interfaces. The router supports multiple WAN interfaces, which include serial, Ethernet, and DSL, providing flexible connectivity options to accommodate various networking scenarios.

The CISCO1841-HSEC/K9 also boasts an integrated security architecture. This router is equipped with advanced security features, including firewall capabilities, VPN support, and intrusion prevention systems. These technologies ensure that data is protected while being transmitted across the network. The built-in security features help organizations safeguard sensitive information against potential threats and cyberattacks.

In terms of performance, the CISCO1841-HSEC/K9 is powered by a high-speed processor and dynamic routing capabilities, which allow it to efficiently handle high volumes of traffic without compromising performance. The router supports various routing protocols, including EIGRP, OSPF, and BGP, facilitating seamless data flow and efficient route management.

Another noteworthy characteristic of the CISCO1841-HSEC/K9 is its support for voice and video services. This capability enables businesses to deploy unified communications applications, such as VoIP and video conferencing, enhancing collaboration among team members and improving overall productivity.

Moreover, the router is designed for easy management and monitoring. Cisco’s IOS software provides a user-friendly interface, allowing network administrators to configure, operate, and troubleshoot the network with ease. The router also supports Cisco’s Smart Install feature for simplified deployment and management.

In summary, the Cisco Systems CISCO1841-HSEC/K9-RF is a powerful and adaptable router that combines security, flexibility, and performance. Its modular design, robust security features, support for various routing protocols, and capabilities for multimedia applications make it a compelling choice for businesses looking to enhance their network infrastructure while addressing current and future demands.