Remote Location

Figure 16 IP Connection Between Routers

408 555-3737

				919 555-8282
	FXS VIC		FXS VIC
	0/0		FXS VIC
	0/0	1/0
		1/0
192.168.19.27	West	IP cloud	East	192.168.11.3
	West		East
	FXS VIC		FXS VIC	919 555-9595
408 555-4141	0/1	1/1		919 555-9595
				22335

Look at the connection between the West router and the IP network. This connection does not include a voice port or an attached telephone—it leads from a WAN interface to a remote destination somewhere on the IP network. IP routers can locate IP addresses on the network, but they cannot locate telephone numbers. To route an outgoing voice call over this connection, the West router must associate a telephone number in the East office with the IP address of the East router.

Table 5 assigns a dial-peer tag to each telephone number and its associated IP address on the West router. This type of dial peer is called a remote dial peer or VoIP dial peer. (Remember, the dial-peer tags are arbitrary.) A VoIP dial peer associates a telephone number with an IP address.

Table 5	West Router Remote Dial Peers

Remote Location		Telephone Number	Destination Pattern	IP Address	Dial-Peer Tag

East		919 555-8282	19195558282	192.168.11.3	501

East		919 555-9595	19195559595	192.168.11.3	502

You can create a VoIP dial peer on the West router for every telephone on the East router, all associated with the same IP address. But it is much easier to use periods as wildcards, as shown in Table 6.

Table 6	West Router Remote Dial Peers with Wildcards

Remote Location		Telephone Number	Destination Pattern	IP Address	Dial-Peer Tag

East		919 555-xxxx	1919555....	192.168.11.3	501

Construct a table similar to Table 6 for your own routers, assigning your own telephone numbers, IP addresses, and dial-peer tags.

Note The IP addresses shown in this guide are meant only as examples. When you configure your network, be sure to use your own IP addresses.

Enter the following information on the West router to create the dial-peer configuration given in Table 6:

West(config)# dial-peer voice 501 voip

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

West(config-dial-peer)#session target ipv4:192.168.11.3

Cisco IOS software describes the remote network as the session target. This command is followed by the IP address of the remote router. The prefix ipv4 means IP version 4. Alternatively, you can use the prefix dns followed by the Domain Name System (DNS) name, as follows:

West(config-dial-peer)#session target dns:voice.eastrouter.com

Configure a dial peer on each router for each telephone number on every other router connected to it.

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.

Figure 16 IP Connection Between Routers

Destination Pattern

IP Address

Dial-Peer Tag

1760 specifications