Pstn Gateway Access Using Fxo Connection; Router Sj Configuration - Cisco 2620 Configuration Manual

Note
PBXs should be configured to pass all DTMF signals to the router. Cisco recommends that you do not
configure "store-and-forward" tone.
Note
If you change the gain or the telephony port, make sure that the telephony port still accepts DTMF
signals.

PSTN Gateway Access Using FXO Connection

The following example shows how to configure VoIP 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 4-3
Figure 4-3
Note
This example assumes that the company already has established a working IP connection between its
two remote offices.

Router SJ Configuration

! Configure pots dial-peer 1
dial-peer voice 1 pots
destination-pattern +14085274000
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
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
4-8
illustrates the topology of this connection example.
PSTN Gateway Access Using FXO Connection Example
Chapter 4 Configuring Voice-over-IP
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