21
Cisco 1751 Voice-over-IP Quick Start Guide
78-11259-05
Configuring Voice-over-IP
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
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.
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
408 555-xxxx
East
West
22639
192.168.19.27
Destination
Source
dial-peer voice 801 voip
destination-pattern 1408555….
session target ipv4:192.168.19.27
num-exp 5.... 1408555....
IP cloud
