Configure the East router similar to the West router. The East router connects to the PBX through an E&M VIC port 0/1. Enter the following commands to configure a POTS dial peer for all East telephones:

East(config)# dial-peer voice 211 pots

East(config-dial-peer)#destination-pattern 1919555....

East(config-dial-peer)# port 0/1

Enter the following commands to configure a VoIP dial peer for telephones on the West router:

East(config)# dial-peer

voice 221 voip

East(config-dial-peer)#

destination-pattern 1408555....

East(config-dial-peer)#

session target ipv4:192.168.19.27

East(config-dial-peer)#

exit

East(config)#

 

Enter the following command to configure number expansion and to make it easy for East users to dial numbers on the West router:

West(config)# num-exp 5....

1408555....

Finally, configure the E&M port:

East(config)# voice-port 0/1

East(config-voice-port)# signal immediate

East(config-voice-port)# operation 4-wire

East(config-voice-port)# type 2

East(config-voice-port)# shut

East(config-voice-port)# no shut

Checking the E&M Configuration

If you configured the E&M interfaces correctly, you can place calls from a telephone served by one PBX to a telephone served by the other PBX (using just the extension, if you configured number expansion). If you have trouble placing calls, ping the remote router to make sure you have IP connectivity.

Note See the “Configuring Quality of Service” section on page 31 if you need to improve the quality of voice connections.

Configuring ISDN BRI NT/TE Interfaces

The ISDN BRI VIC provides digital connectivity for VoIP networks using the European Telecommunications Standards Institute (ETSI) Net3 switch type. The BRI VIC presents an ISDN S/T physical interface that connects to a network termination (NT) or terminal equipment (TE) device. With the ISDN BRI VIC, you can connect the Cisco 1760 router to a PBX network in NT or TE mode, or to a PSTN in TE mode.

Each of the two BRI ports can operate in NT mode as the clock source or in TE mode as a clock slave. For example:

A PBX line card connection provides the BRI interface with a clock source operating in NT mode, so that the VIC port operates as a clock slave in TE mode.

A PBX trunk card connection provides the BRI interface as a clock slave operating in TE mode, so that the VIC port operates as a clock source in NT mode.

Figure 22 shows an example of a network using ISDN BRI voice interfaces.

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Cisco Systems 1760 quick start Configuring Isdn BRI NT/TE Interfaces, Checking the E&M Configuration

1760 specifications

The Cisco Systems 1760 series routers are part of Cisco’s popular line of integrated services routers, designed primarily for small to medium-sized businesses and branch offices. The 1760 series was introduced to provide robust connectivity and routing solutions that facilitate secure and reliable networking. Aimed at offering flexibility, these routers integrate multiple functionalities to enhance operational performance.

One of the main features of the Cisco 1760 router is its modularity. It supports various interface and service modules that allow for customization based on specific networking needs. This modular design enables businesses to expand their networking capabilities over time without necessitating a complete hardware overhaul. The router typically comes equipped with two WAN slots and numerous interface options, including Fast Ethernet and serial interfaces.

The 1760 series routers also support advanced security features, providing businesses with a secure environment for their data transmissions. Built-in firewall capabilities, along with support for Virtual Private Network (VPN) protocols, ensure that sensitive information remains protected. Furthermore, the integration of IPsec and MPLS security features assists organizations in maintaining secure and scalable connections across diverse networks.

Another characteristic of the Cisco 1760 is its support for various technologies, including Quality of Service (QoS). QoS functionality allows network administrators to prioritize traffic, ensuring that critical applications receive the bandwidth they require while minimizing latency. This ability is particularly valuable in environments where voice, video, and essential data applications compete for resources.

The router’s ease of management is also noteworthy. With Cisco’s IOS (Internetwork Operating System), the 1760 provides a user-friendly interface allowing for straightforward configuration and monitoring. The simplicity in managing the network devices helps reduce the burden on IT personnel and enhances overall operational efficiency.

Further enhancing the router’s capabilities is its support for voice over IP (VoIP) applications, making it an ideal choice for organizations looking to implement modern telephony solutions. The ability to support multiple voice channels while maintaining adequate data throughput positions the 1760 as an attractive option for businesses transitioning to unified communications.

In summary, the Cisco Systems 1760 series routers exhibit a harmonious blend of modularity, robust security, traffic management, and VoIP support. They effectively meet the demands of modern networking environments, making them a reliable choice for organizations aiming to streamline operations while ensuring secure connectivity. With their adaptable design, these routers can serve as a powerful backbone for enterprise networking needs.