Cisco Systems CISCO1751 Configuring FXO Interfaces, Other Routers on the Network, Remote Location

Configuring Voice-over-IP

Table 11 East Router Remote Dial Peers with Wildcards

Remote Location	Telephone Number	IP Address	Dial-Peer Tag
West	408 555-xxxx	192.168.19.27	801

Enter the following information on the East router to create the dial-peer configuration given in Table 11:

East(config)#	num-exp 5	.... 1408555....
East(config)#	dial-peer	voice 801 voip
East(config-dial-peer)#		destination-pattern 1408555....
East(config-dial-peer)#		session target ipv4:192.168.19.27

These commands are summarized in Figure 17.

Figure 17 East Router Configured for Remote Dial Peers

192.168.19.27

West	IP cloud		East
408 555-xxxx		dial-peer voice 801 voip
		destination-pattern 1408555….
		session target ipv4:192.168.19.27
		num-exp 5.... 1408555....

Destination Source

22639

Other Routers on the Network

If the path between endpoints of a voice call travels through intermediate routers, configure those routers for VoIP traffic, as described in the section “Configuring FXS Interfaces” earlier in this guide.

You need to configure POTS or VoIP dial peers on an intermediate router only if that router also has voice devices attached to it.

Checking FXS Configuration

If you configured VoIP dial peers on your router by following these examples, you can place calls from that router to telephones on the remote routers (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, or use the show dial-peer voice command to verify that the data you configured is correct.

Note Refer to the section “Tuning Parameters for Real-Time Voice Traffic” if you need to improve the quality of voice connections.

Configuring FXO Interfaces

FXO interfaces provide a gateway from the VoIP network to the analog PSTN or to a PBX that does not support E&M signaling so that users can reach telephones and fax machines outside the VoIP network. Figure 18 shows a typical FXO gateway attached to the West router.

Cisco 1751 Voice-over-IP Quick Start Guide

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