Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics

Understanding Cisco IOS Software Basics

Table 1-1 Common Command Modes

 

 

Router Prompt

 

Command Mode

Access Method

Displayed

Exit Method

 

 

 

 

User EXEC

Log in.

Router>

Use the logout

 

 

 

command.

 

 

 

 

Privileged EXEC

From user EXEC mode,

Router#

To exit to user EXEC

 

enter the enable

 

mode, use the disable,

 

command.

 

exit, or logout

 

 

 

command.

 

 

 

 

Global configuration

From the privileged

Router (config)#

To exit to privileged

 

EXEC mode, enter the

 

EXEC mode, use the

 

configure terminal

 

exit or end command,

 

command.

 

or press Ctrl-Z.

 

 

 

 

Interface configuration

From the global

Router (config-if)#

To exit to global

 

configuration mode,

 

configuration mode, use

 

enter the interface type

 

the exit command.

 

number command, such

 

To exit directly to

 

as interface serial 0/0.

 

 

 

privileged EXEC mode,

 

 

 

 

 

 

press Ctrl-Z.

 

 

 

 

Timesaver Each command mode restricts you to a subset of commands. If you are having trouble entering a command, check the prompt, and enter the question mark (?) for a list of available commands. You might be in the wrong command mode or using the wrong syntax.

In the following example, notice how the prompt changes after each command to indicate a new command mode:

Router> enable

Password: <enable password>

Router# configure terminal

Router(config)# interface serial 0/0

Router#

%SYS-5-CONFIG_I: Configured from console by console

The last message is normal and does not indicate an error. Press Return to get the Router# prompt.

Note You can press Ctrl-Zin any mode to immediately return to enable mode (Router#), instead of entering exit, which returns you to the previous mode.

Undoing a Command or Feature

If you want to undo a command you entered or disable a feature, enter the keyword no before most commands; for example, no ip routing.

Cisco VG224 Voice Gateway Software Configuration Guide

1-4

OL-5005-01

 

 

Page 18
Image 18
Cisco Systems VG224 manual Undoing a Command or Feature

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.