4-6
Cisco IAD2430 Series Integrated Access Devices Software Configuration Guide
OL-4306-03
Chapter 4 Configuring Voice over IP
VoIP Configuration Examples
ip rtp compression-connections 25
fair-queue 64 256 3
clockrate 128000
! Configure IGRP
router igrp 888
network 20.0.0.0
network 40.0.0.0
Configuration for IAD-2
hostname iad-2
! Create pots dial-peer 2
dial-peer voice 2 pots
! Define its associated telephone number and voice-port
destination-pattern +4152222222
port 2/0
! Create voip dial-peer 20
dial-peer voice 20 voip
!Define its associated telephone number and IP address
destination-pattern +4081111111
session target ipv4:40.0.0.1
! Configure channel group on T1/E1
controller T1 1/0
channel-group 0 timeslots 1-24
! Configure serial interface 1/0:0
interface Serial1/0:0
ip address 40.0.0.1 255.0.0.0
no ip mroute-cache
! Configure RTP header compression
ip rtp header-compression
ip rtp compression-connections 25
fair-queue 64 256 3
clockrate 64000
! Configure IGRP
router igrp 888
network 40.0.0.0
Linking PBX Users with Digital E&M Trunk Lines over T1/E1 CAS
The following example shows how to configure VoIP to link PBX users with digital E&M trunk lines
over T1/E1 Channel-associated signalling (CAS). (See the
“Configuring DS0 Groups for CAS” section
on page 3-14.)
In this example, a company wants to connect two offices: one in San Jose, California, and the other in
Salt Lake City, Utah. Each office has an internal telephone network using a PBX connected to the voice
network by an E&M interface. Both offices are using E&M Port Type II, with four-wire operation and
ImmediateStart signaling. Each E&M interface connects to the router by means of two voice interface
connections. Users in San Jose dial “8-569” and then the extension number to reach a destination at the
Salt Lake City office. Users in Salt Lake City dial “4-527” and then the extension number to reach a
destination in the San Jose office.
Figure 4-2 shows the topology of this connection example.
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