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PSTN Gateway Access Using FXO Connection
Configuring Voice over IP for the Cisco 3600 Series VC-45
PSTN Gateway Access Using FXO Connection
The following example shows how to configure Voice over IP to link users with the PSTN gateway
using an FXO connection.
In this example, users connected to Router SJ in San Jose, California can reach PSTN users in Salt
Lake City, Utah via Router SLC. Router SLC in Salt Lake City is connected directly to the PSTN
through an FXO interface.
Figure 14 illustrates the topology of this connection example.
Figure 14 PSTN Gateway Access Using FXO Connection Example
Note This example assumes that the company already has established a working IP connection
between its two remote offices.
Configuration for Router SJ
! Configure pots dial peer 1
dial-peer voice 1 pots
destination-pattern +14085554000
port 1/0/0
! Configure voip dial peer 2
dial-peer voice 2 voip
destination-pattern 9...........
session target ipv4:172.16.65.182
! Configure the serial interface
interface serial 0/0
clock rate 2000000
ip address 172.16.1.123
no shutdown
S6617
1(408) 555-4000
Router SJ
San Jose Salt Lake City
Router SLC
172.16.1.123 172.16.65.182
PSTN user
Voice port
1/0/0
IP cloud
Voice port
1/0/0
PSTN
cloud