Cisco Systems Understanding ROM Monitor Mode for Cisco VG Series IP Phones

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Appendix A Using the ROM Monitor

Exiting the ROM Monitor Mode

R16

= 0xffffffff

R17

= 0xffffffff

R18

= 0xffffffff

R19

= 0xffffffff

R20

= 0xffffffff

R21

= 0xffffffff

R22

= 0xffffffff

R23

= 0xffffffff

R24

=

0xffffffff

R25

=

0xffffffff

R26

=

0xffffffff

R27

=

0xffffffff

R28

=

0xffffffff

R29

=

0xffffffff

R30

=

0xffffffff

R31

=

0xffffffff

frame—Displays an individual stack frame.

sysret—Displays return information from the last booted system image. This information includes the reason for terminating the image, a stack dump of up to eight frames, and, if an exception is involved, the address where the exception occurred; for example:

rommon 8> sysret System Return Info:

count: 19, reason: user break

pc:0x801111b0,

error address: 0x801111b0

Stack Trace:

 

FP: 0x80005ea8,

PC: 0x801111b0

FP: 0x80005eb4,

PC: 0x80113694

FP: 0x80005f74,

PC: 0x8010eb44

FP: 0x80005f9c,

PC: 0x80008118

FP: 0x80005fac,

PC: 0x80008064

FP: 0x80005fc4,

PC: 0xfff03d70

FP: 0x80005ffc,

PC: 0x00000000

FP: 0x00000000,

PC: 0x00000000

meminfo—Displays size in bytes, starting address, available range of main memory, the starting point and size of packet memory, and size of NVRAM; for example:

rommon 9> meminfo

Main memory size: 128 MB.

Available main memory starts at 0x10000, size 40896KB IO (packet) memory size: 5 percent of main memory.

Exiting the ROM Monitor Mode

You must set the configuration register to a value from 0x2 to 0xF for the voice gateway to boot a Cisco IOS image from flash memory upon startup or reloading.

The following example shows how to reset the configuration register and cause the voice gateway to boot a Cisco IOS image stored in flash memory:

rommon 1 > confreg 0x2101

You must reset or power cycle for a new configuration to take effect:

rommon 2 > boot

The voice gateway boots the Cisco IOS image in flash memory. The configuration register changes to 0x2101 the next time that you reset or power cycle the voice gateway.

Cisco VG202, Cisco VG202XM, Cisco VG204, and Cisco VG204XM Voice Gateways Software Configuration Guide

 

A-8

OL-16191-01

 

 

 

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Contents Americas Headquarters Text Part Number OL-16191-01Copyright 2008-2013 Cisco Systems, Inc. All rights reserved N T E N T S Changing the Configuration Register Manually A-5 Document Objectives AudienceConvention Description AccessibilityDocumentation Conventions Boldface fontRelated Documentation Cisco VG200 Series GatewaysViii About the Voice Gateways Port Numbering ConventionsBack Panel Feature Locations on the Cisco VG202 Chassis Chapter before you proceed to the next chapter Understanding Cisco IOS Software BasicsAbout Cisco IOS Software ReleaseGetting Help Command ModesCommand Mode Access Method VG Prompt Displayed Exit Method Exit , or logoutConfigure terminal Undoing a Command or FeatureSaving Configuration Changes Interface fast ethernetUpgrading to a New Cisco IOS Release Where to Go NextTypical Voice Gateway Deployment Scenario Page OL-16191-01 Procedure About Configuring Your Voice GatewayPreparing to Configure Your Cisco Voice Gateway Using the setup Command Determine the addressing plan for each network protocolEnter a hostname for the voice gateway Enter hostname VG VG204 Completing the Configuration OL-16191-01 Restriction Configuring the Hostname and PasswordConfiguration guide and command reference publications Exit Verifying the Hostname and PasswordCommand or Action Purpose ExampleBefore You Begin Configuring Fast Ethernet InterfacesEnable Configure terminal Ip routing Exit Ctrl-z Saves the configuration changes to Nvram so that they Saving Configuration ChangesEnable Copy running-config startup-config Ctrl-z Are not lost during resets, power cycles, or powerOL-16191-01 Configuring the Voice Interface PrerequisitesPrompt changes to the privileged Exec enable prompt VG# Restriction for Configuring Auto-Configuration Auto-Configuration With a Dhcp ServerEnable Configure terminal Ip address dhcpCcm-manager config server tftpipaddress Ccm-manager sccp Auto-Configuration Without a Dhcp ServerVoice service voip Fax protocol t38 nseforce Configuration port Enables the Sccp and its related applicationsDownloads Cucm XML configuration files and enables Transcoding and conferencingEnables Cucm auto-configuration of the Cisco IOS Sccp Sccp ccm group group-numberDial-peer voice tags pots Service stcapp Command or Action Purpose Port Number Address Configuring the MAC Address ConventionLast Three Digits of the MAC 000 001 002 003Enters global configuration mode. You have entered Configuring CallsEnters privileged Exec mode Global configuration mode when the prompt changes toCaller ID Call WaitingThree-Party Conferencing Allows the sending or receiving of caller ID information Caller-id enable typeCaller-id enable type Exit OL-16191-01 Entering the ROM Monitor Mode Enable Configure terminal Config-register value Exit ReloadAbout the ROM Monitor Commands Listing the ROM Monitor Commands Command DescriptionsReset or Recovering Boot and System ImagesCommand Description MeminfoChanging the Configuration Register Manually Using the Configuration RegisterAbout Changing the Configuration Register Changing the Configuration Register Using PromptsAbout the Console Download Function Using the Console Download FunctionCommand Description Context-Displays processor context for example Using Debug CommandsError Reporting Exiting the ROM Monitor Mode Rommon 9 meminfo Main memory size 128 MBMeminfo A-8reset A-4 FiguresReset command ROM monitor Commands Debug commands
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VG202, VG204XM, VG204, VG202XM specifications

Cisco Systems has long been a leader in the realm of networking technology, providing innovative solutions for businesses of all sizes. Among its products, the Cisco VG202XM, VG204, VG204XM, and VG202 series stand out as vital components in voice gateway solutions for IP telephony applications.

The Cisco VG202XM and VG204 series are designed to facilitate the convergence of voice and data as businesses transition to VoIP (Voice over Internet Protocol). These voice gateways offer seamless integration with legacy telephony systems while enabling the deployment of advanced IP-based telephony features. They are particularly useful for organizations looking to preserve their existing investments in traditional telephony infrastructure while embracing modern communication technologies.

One of the main features of the VG202XM and VG204 series is their support for two-line interfaces, catering to varying deployment needs. The VG202 provides two FXS (Foreign Exchange Station) ports, which allow businesses to connect analog phones and fax machines directly. The VG204 enhances this capability by offering four FXS ports, accommodating larger user bases and providing more connections for local telephony equipment.

These gateways support an array of voice codecs and can handle up to 16 concurrent calls, ensuring high-quality voice communication in busy environments. Their integration with Cisco's Unified Communications Manager allows users to access a host of advanced telephony features such as call forwarding, voicemail, and conferencing.

On the technology front, the VG202XM and VG204 series support both SIP (Session Initiation Protocol) and H.323 protocols, making them versatile for varied network environments. They also offer advanced QoS (Quality of Service) capabilities, ensuring that voice traffic is prioritized over other types of data, which is essential in maintaining call clarity and reliability.

Additionally, the VG204XM variant adds built-in safety features, such as power over Ethernet (PoE), which eliminates the need for separate power supplies for connected devices. This not only streamlines deployment but also enhances the reliability of the voice system.

In terms of management, these devices are equipped with Cisco's user-friendly interface, which simplifies configuration and monitoring. They can be managed through various tools offered by Cisco, making it easier for IT departments to maintain and optimize their voice services.

Overall, the Cisco VG202XM, VG204, VG204XM, and VG202 series deliver robust, scalable, and reliable solutions for businesses aiming to leverage the benefits of voice gateways in their enterprise networks. These devices not only provide essential voice capabilities but also pave the way for future growth and integration in an increasingly digital world.