Appendix C Using the ROM Monitor

Entering the ROM Monitor Mode

Router# show rom-monitor

ReadOnly ROMMON version:

System Bootstrap, Version 12.3(4)T, RELEASE SOFTWARE (fc1)

TAC Support: http://www.cisco.com/tac

Copyright (c) 2001 by cisco Systems, Inc.

No upgrade ROMMON programmed or not yet run

Currently running ROMMON from ReadOnly region

ROMMON from ReadOnly region is selected for next boot

Router#

Following is a sample of an output when both the read-only and the upgrade versions of the ROM monitor are present:

Router# show rom-monitor

ReadOnly ROMMON version:

System Bootstrap, Version 12.3(4)T, RELEASE SOFTWARE (fc1)

TAC Support: http://www.cisco.com/tac

Copyright (c) 2001 by cisco Systems, Inc.

Upgrade ROMMON version:

System Bootstrap, Version 12.3(4)T, RELEASE SOFTWARE (fc1)

TAC Support: http://www.cisco.com/tac

Copyright (c) 2002 by cisco Systems, Inc.

Currently running ROMMON from Upgrade region

ROMMON from Upgrade region is selected for next boot

Router#

Note You can get the same information if you enter the showmon command in ROMMON mode.

Using the upgrade rom-monitor Command

Use the upgrade rom-monitorcommand to upgrade the ROM monitor to a new version. Depending on where the image is located, use the following commands to upgrade the ROM monitor:

upgrade rom-monitor file [URL]

upgrade rom-monitor preference [readonly upgrade]

 

 

upgrade rom-monitors file [URL] command installs the new version of ROM monitor on the router by

 

 

taking the image from the location indicated in the URL. The image is in the form of “.srec’ file. It will

 

 

then reload the router.

 

 

Following is a sample of the output when the upgrade version of ROM monitor is located at

 

 

tftp://223.255.254.254/ajayhn/cvg224_RM2.srec:, and the system configuration has not been saved:

 

 

.Router# upgrade rom-monitor file tftp://223.225.254.254/ajayhn/cvg224_BM2.SREC

 

 

Loading ajayhn/Cvg224_RM2.srec from 223.255.254.254 (via FastEthernet0/0):

 

 

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

 

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

 

 

 

 

[OK - 641719/1283072 bytes]

 

 

This command will reload the router. Continue? [yes/no]: y

 

 

System configuration has been modified. Save? [yes/no]: y

 

 

Building configuration...

 

 

Erasing boot flash eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

 

 

Programming boot flash pppp

 

 

Now Reloading

 

 

System Bootstrap, Version 12.3(4)T, RELEASE SOFTWARE (fc1)

 

 

TAC Support: http:_//www.cisco.com/tac

 

 

Copyright (c) 2001 by cisco Systems, Inc.

 

 

Running new upgrade for first time

 

 

Cisco VG224 Voice Gateway Software Configuration Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-5005-01

 

 

C-7

 

 

 

 

 

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Cisco Systems VG224 manual Using the upgrade rom-monitor Command, Then reload the router, Router# show rom-monitor

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.