Installation guide

Cisco 1751 Voice-over-IP Quick Start Guide

78-11259-04

Configuring Voice-over-IP

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 10.

Construct a table similar to Table 10 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 substitute your own IP addresses.

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

Table 10:

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.

Make things easier by configuring number expansion for East router telephone numbers on the West

router:

West(config)# num-exp 5.... 1919555....

Now users can dial a five-digit extension beginning with 5 from a telephone on the West router to reach

a telephone on the East router.

These commands are summarized in Figure 16.

Figure 16 West Router Conﬁgured for Remote Dial Peers

The West router is now configured to send calls to the East router.

Table 11 shows how to configure the East router to send calls to the West router.

Table 10 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

919 555-xxxx

East

West

22336

192.168.11.3

dial-peer voice 501 voip

destination-pattern 1919555….

session target ipv4:192.168.11.3

num-exp 5…. 1919555….

Source Destination

IP cloud