Chapter 4 Configuring Voice over IP

Configuring the Voice Interface

To configure the voice interface configuration mode, follow this procedure:

Step 1 Connect a console to the Cisco VG224. If you need instructions for connecting a console, refer to the installation chapter of your Cisco VG224 installation and configuration guide.

Step 2 Power on the Cisco VG224. If the current configuration is no longer valid, after about one minute you see the following prompt:

Would you like to enter the initial dialog? [yes/no]:

Answer no. You now enter the normal operating mode of the Cisco VG224.

Note If the current configuration is valid, you enter the normal operating mode automatically.

Step 3 After a few seconds, you see the user EXEC prompt (Router>). Type enable and the password to enter enable mode:

Router> enable

Password: <password>

Configuration changes can be made only in enable mode. The prompt changes to the privileged EXEC (enable) prompt (Router#):

Router#

Step 4 Enter the configure terminal command to enter configuration mode:

Router# configure terminal

Router(config)#

The Cisco VG224 enters global configuration mode, indicated by the Router(config)# prompt.

Step 5 If you have not configured the Cisco VG224 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 Cisco VG224’s hardware installation and software configuration guides 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 Cisco VG224 for voice traffic, refer to the VoIP references in Prerequisites, page 4-1.

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-configcommand:

Router# show running-config

To see the configuration currently stored in NVRAM, enter the show startup-configcommand at the enable prompt:

Router# show startup-config

Cisco VG224 Voice Gateway Software Configuration Guide

4-2

OL-5005-01

 

 

Page 36
Image 36
Cisco Systems VG224 manual Router# show running-config, Router# show startup-config

VG224 specifications

The Cisco Systems VG224 is a versatile VoIP (Voice over Internet Protocol) gateway designed to facilitate the integration of traditional phone systems with modern IP-based communications. This device plays a crucial role in providing connectivity between analog phones and digital networks, allowing organizations to transition smoothly from legacy telephony systems to IP telephony.

One of the standout features of the VG224 is its ability to support up to 24 analog phone lines. This scalability makes it an ideal choice for small to medium-sized businesses that require a dependable solution to handle their telephony needs without overspending on infrastructure. The VG224 acts as a bridge, converting analog voice signals into digital IP packets, thus enabling seamless communication over the Internet or intranets.

The VG224 is equipped with a range of technologies that enhance its functionality and reliability. Voice activity detection (VAD), comfort noise generation (CNG), and echo cancellation are just some examples of the advanced audio processing techniques integrated into the VG224. These technologies improve call quality by ensuring clear and uninterrupted conversations, even under varying network conditions.

In terms of characteristics, the VG224 features a user-friendly interface with a web-based management console, making it easy for network administrators to configure and manage the device remotely. This streamlined approach to management is crucial for businesses that require quick adjustments to their communication infrastructure without the need for extensive technical knowledge.

The VG224 supports multiple signaling protocols, including H.323, MGCP (Media Gateway Control Protocol), and SIP (Session Initiation Protocol). This flexibility allows it to integrate seamlessly with various IP telephony systems and offers businesses the option to utilize their preferred communication standards. Additionally, the device supports power over Ethernet (PoE), providing the convenience of powering devices through the same cable used for data connectivity, thus reducing the need for additional power sources.

In conclusion, the Cisco Systems VG224 is a robust VoIP gateway that combines advanced technology with user-friendly features. Its capacity to support up to 24 analog lines, along with its compatibility with various signaling protocols, makes it an excellent choice for businesses looking to modernize their telecommunication systems while maintaining the reliability of traditional analog connections. With its ease of management and high-quality voice processing capabilities, the VG224 stands out as a key asset for any organization aiming to optimize its communication infrastructure.