Specifications
Table Of Contents
- Software Configuration Guide
- Contents
- Preface
- Understanding Interface Numbering and Cisco IOS Software Basics
- Understanding Interface Numbering
- Understanding Cisco IOS Software Basics
- Upgrading to a New Cisco IOS Release
- Where to Go Next
- Using the Setup Command Facility
- Before Starting Your Router
- Using the setup Command Facility
- Configuring Global Parameters
- Configuring Interface Parameters
- Completing the Configuration
- Where to Go Next
- Configuring with the Command-Line Interface
- Configuring the Host Name and Password
- Configuring 1-Port and 2-Port Ethernet Interfaces
- Configuring Fast Ethernet Interfaces
- Configuring Asynchronous/Synchronous Serial Network Modules or WAN Interface Cards
- Configuring 16-Port and 32-Port Asynchronous Network Modules
- Configuring ISDN BRI WAN Interface Cards
- Configuring T1 and E1 Interfaces
- Configuring T1 (FT1) WAN Interface Cards
- Configuring ATM Interfaces
- Configuring Inverse Multiplexing for ATM Interfaces
- Configuring Analog Modem Interfaces
- Configuring Wireless Multipoint Interfaces
- Checking the Interface Configuration
- Configuring 1-Port ADSL WAN Interface Card
- Configuring the NM-AIC-64, Contact Closure Network Module
- Configuring the 1-Port HSSI Network Module
- Configuring the Compression Network Module for the Cisco 3600 Series Routers
- Configuring the Digital Modem Network Module for the Cisco 3640 Router
- Prerequisites
- Configuration Tasks
- Configure the E1/T1 Network Module for ISDN PRI
- Configure the ISDN D-Channel Serial Interfaces
- Configure the Loopback Interface
- Configure the LAN Interface
- Create the Group Asynchronous Interface
- Configure the ISDN Dialer Interface
- Configure the Default IP Pool Information
- Configure Modem Lines for Dial-In and Dial-Out
- Configuration Example
- Configuring 1-Port G.SHDSL WAN Interface Card
- Saving Configuration Changes
- Where to Go Next
- Configuring Voice-over-IP
- Voice-over-IP Prerequisites
- Configuring the Voice Interface
- Voice-over-IP Configuration Examples
- Where to Go Next
- Configuration Examples
- Cisco 2600 Series Router Configuration Example
- Cisco 3631 Router Configuration Example
- Cisco 3725 Router Configuration Example
- 1-Port ADSL WAN Interface Card Configuration Examples
- NM-AIC-64, Contact Closure NetworkConfiguration Examples
- Cisco 3640 Central Site Configuration to Support ISDN and Modem Calls
- Formatting the Compact Flash Memory Cards
- Using the ROM Monitor
- Index
4-3
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-03
Chapter 4 Configuring Voice-over-IP
Step 5 If you have not configured the router before, or want to change the configuration, use Cisco IOS
commands to configure global parameters, passwords, network management, and routing protocols. In
this example, IP routing is enabled:
Router(config)# ip routing
For complete information about global configuration commands, refer to the Cisco IOS configuration
guides and command references.
Step 6 If you have not already done so, configure the network module or WAN interface card that you plan to
use for IP traffic. For instructions, see your router’s installation and configuration guide or the
configuration note for the network module or WAN interface card.
Step 7 To configure another interface, enter the exit command to return to the Router(config)# prompt.
Step 8 To configure the router for voice traffic, refer to the detailed instructions in the Voice over IP
Configuration document.
Step 9 When you finish configuring interfaces, exit configuration mode and return to the enable prompt by
pressing Ctrl-z. To see the current operating configuration, including any changes you just made, enter
the show running-config command:
Router# show running-config
To see the configuration currently stored in NVRAM, enter the show startup-config command at the
enable prompt:
Router# show startup-config
Step 10 The results of the show running-config and show startup-config commands differ from each other if
you have made changes to the configuration, but have not yet written them to NVRAM. To write your
changes to NVRAM, making them permanent, enter the copy running-config startup-config command
at the enable prompt:
Router# copy running-config startup-config
Building configuration. . .
[OK]
Router#
The router is now configured to boot in the new configuration.
Voice-over-IP Configuration Examples
The actual VoIP configuration procedure you complete depends on the topology of your voice network.
The following configuration examples should give you a starting point. Of course, these configuration
examples would need to be customized to reflect your network topology.
Configuration procedures are supplied for the following scenarios:
• FXS-to-FXS Connection Using RSVP, page 4-4
• Linking PBX Users with E&M Trunk Lines, page 4-6
• PSTN Gateway Access Using FXO Connection, page 4-8
• PSTN Gateway Access Using FXO Connection (PLAR Mode), page 4-10
• Configuring Direct-Inward Dialing on a BRI Port, page 4-11
These examples are described in the following sections.