Table of Contents

Release Notes for Cisco VG200 for Cisco IOS Release 12.1(3)T

Release Notes for Cisco VG200 for Cisco IOS Release 12.1(3)T

Sptember 5, 2000

These release notes for the Cisco VG200 support Cisco IOS Release 12.1(3)T. These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode or modem code and related documents.

Contents

These release notes describe the following topics:

• Introduction
  
  
• System Requirements
  
  
• Important Notes
  
  
• Caveats
  
  
• Related Documentation
  
  
• Software Configuration Tips on the Cisco TAC Home Page
  
  
• Obtaining Documentation
  
  
• Obtaining Technical Assistance
  
  

Introduction

The Cisco VG200 is designed to provide easy integration between Voice over IP (VoIP) network resources, especially the Cisco IP Telephony solution, and the public switched telephone system (PSTN). The current release of the Cisco VG200 gateways provides the following main features:

• 10/100BaseT Ethernet connection for connecting to VoIP network resources
  
  
• Support for one-slot or two-slot analog or digital voice network modules, useable with the Foreign Exchange Station (FXS), Foreign Exchange Office (FX0), and T1 voice interface cards (VICs).
  
  
• Support for the Media Gateway Control Procotol (MGCP) when used with the analog voice network module and Cisco CallManager Release 3.0 or other MGCP call agents.
  
  
• Support for the H.323 standard when used with the digital voice network module and H.323 end points.
  
  

System Requirements

This section describes the system requirements for Cisco IOS Release 12.1.3(T):

• Memory Requirements
  
  
• Hardware Supported
  
  
• Determining the Software Version
  
  
• Upgrading to a New Software Release
  
  

Memory Requirements

At this time, Cisco IOS Release 12.1(3)T supports only the Cisco VG200 hardware platform. The Cisco VG200 comes preconfigured with the required memory resources, which include:

Flash memory—8 MB

DRAM memory—32 MB

Hardware Supported

Table 1 summarizes the modules and interfaces supported on the Cisco VG200.

Determining the Software Version

To determine the version of Cisco IOS software running on a Cisco VG200, log in to the router and enter the show version EXEC command:

router> show version

Cisco Internetwork Operating System Software
IOS (tm) VG200 Software (vg200-i6s-mz), Version 12.1(3)T, RELEASE SOFTWARE
 

The Cisco VG200 supports only one software image, VG200-i6s-mz.

Upgrading to a New Software Release

For general information about upgrading to a new software release, see the product bulletin, Cisco IOS Upgrade Ordering Instructions located on CCO at:

Service & Support: Software Center: Cisco IOS Software: Product Bulletins: Software

Under General System Software Bulletins, click Cisco IOS Upgrade Ordering Instructions, No. 957

Important Notes

This section contains important notes about the following topics:

• Handling Incoming Caller ID Digits on an E&M Port
  
  
• Managing Input Gain for Cisco IP Voice Applications
  
  
• Enabling DTMF Relay with MGCP
  
  
• Deprecated MIBs
  
  

Handling Incoming Caller ID Digits on an E&M Port

When using an H.323 T1-CAS E&M port on the Cisco VG200, Incoming Caller ID Digits may not be processed correctly by Cisco IP IVR applications, such as Cisco IP Auto-Attendant.

Depending on the T1-CAS line provisioning, incoming DNIS digits received by the Cisco VG200 after its first wink to the Central Office (CO) are treated as user-entered digits and are sent to the remote endpoint as out-of-band DTMF digits. If the remote endpoint is a Cisco IP IVR application, the out-of-band digits will be interpreted as a user entry and change the application response. There are two ways to handle this situation:

• Request the T1 service provider to stop sending DNIS digits.
  
  
• Configure an IP phone with the same directory number as the incoming DNIS, then modify the "forward all" selection for this phone so that it sends the incoming call to the desired destination.
  
  

Managing Input Gain for Cisco IP Voice Applications

When using the FXO ports on a Cisco VG200, set the input gain greater than 10 to achieve adequate audio quality for use with Cisco IP voice applications or the Cisco IP Phone 7960. Enter the following series of commands from the Cisco IOS command line to set the correct value for input gain:

vg200# configure terminal

vg200(config)# voice-port x/x/x input gain <value> 
 

Permitted entries for <value> are from-6 to 14. Gain values higher than 12 may cause DTMF recognition difficulties.

Enabling DTMF Relay with MGCP

Make sure that you use the MGCP configuration command for enabling DTMF relay. If this command is not configured, DTMF tones will be not be regenerated correctly on the remote endpoint. The required command is as follows:

router(config)# mgcp dtmf-relay codec all mode out-of-band
 

For further information about configuring MGCP, refer to the Software Configuration Guide for the Cisco VG200.

Deprecated MIBs

Older Cisco Management Information Bases (MIBs) will be replaced in a future release. OLD-CISCO-* MIBS are currently migrated into more scalable MIBs—without affecting existing Cisco IOS products or NMS applications. You can update from deprecated MIBs to the replacement MIBs as shown in Table 2.

Caveats

Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious, and severity 3 caveats are still less serious.

The following severity 3 caveats are specific to Cisco IOS Release 12.1(3)T when used with the Cisco VG200.

• CSCdr08492
  
  

Description: Unable to complete an outgoing FXO call with a route pattern containing an asterisk (*).

Detail: When using MGCP with the Cisco VG200 connected to Cisco CallManager 3.0(1), a call using a route pattern containing the asterisk digit (*) is not completed. For instance, the route pattern 72.XXXXXXX works perfectly, but the route pattern *72.XXXXXXX is not received by the Cisco CallManager for processing.

Workaround: Fixed in renumber build 12.1(3.5)T2..

• CSCdr73983
  
  

Description: The Cisco VG200 must generate one or more digits before users can get secondary dial tone.

Detail: When connected to a line with a secondary dial tone, such as a tie line, the Cisco VG200 remains on hook until it generates one more digits on the outbound port.

Workaround: Users can dial any digit, such as a "9," to access the secondary dial tone. The remote PBX should be configured to discard this digit.

• CSCdr80449
  
  

Description: Audio signal is lost when using MGCP with Cisco IP Phone 7960.

Detail: When using the Cisco IP Phone 7960 with MGCP, when an MGCP command arrives at the Cisco VG200 to play a digit, the digital signal processor (DSP) plays the digit and resets the RTP (Real Time Procotol) timestamps to a new value. Because RTP timestamps are used by the Cisco IP Phone 7960 to determine packet placement with a first in first out (FIFO) buffer, audio is dropped and calls to an interactive voice response (IVR) unit become interrupted because IVR prompts are truncated or lost.

• Workaround: None at this time. A fix is planned for general availability in Cisco IOS 12.2(1)T, available in January, 2001. An earlier interim build will be available on a limited release basis sooner, and can be ordered by calling the Cisco Technical Assistance Center.
  
  
• CSCdr88965
  
  

Description: Cisco VG200 FXO ports configured as ground-start in Cisco CallManager may become stuck in Power Denial state after resetting the Cisco CallManager.

Detail: This occurs when a call is made from a telephony endpoint to the PSTN by means of an FXO port on the Cisco VG200 and the Cisco CallManager goes off-line. A disconnect comes in from the PSTN while the Cisco CallManager is down, but the MGCP on-hook event is lost, and as a result the Cisco VG200 does not receive the required Deletion Connection command from the Cisco CallManager.

Workaround: Configure the FXO port as loop start in the Cisco CallManager Configuration page.

• CSCdr97508
  
  

Description: The default value for IP Type of Service (ToS) is incorrect in 12.1(3)T.

Detail: The value for the IP ToS value should be 5 so that the IP packet header is set to time critical and packets get higher priority handling. In 12.1(3)T the default setting is 3 and some packet delay may occur with this setting. The default in 12.1(4)T will have the correct value of 5.

Workaround: Enter the following series of commands from the IOS command line to set the correct value for ToS:

vg200# configure terminal

vg200(config)# mgcp ip-tos precedence 5

VG200(config)# end

 

• CSCdr10343
  
  

Description: Using MGCP with the Cisco VG200, entered digits are dropped on an outgoing FXO call.

Detail: When a connected user enters digits too quickly (for instance, to access a voice mail box), some digits in the middle of the pattern are lost.

Workaround: The condition is improved by reducing the voice port digit timer to 50ms. However, digits can still be dropped if a user enters digits very rapidly. To reduce the voice port digit timer, enter the following command:

vg200(config)# voice-port x/x/x timing digit <50 - 500> milliseconds

 

For information on caveats in Cisco IOS Release 12.1(3)T, refer to Caveats for Cisco  IOS Release 12.1.3(T), which lists severity 1 and 2 caveats for Cisco IOS Release 12.1.3(T).

Note   If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. Click on this path: Software Center: Cisco IOS Software: Cisco IOS Bug Toolkit: Cisco Bug Navigator II. You can also find Bug Navigator II at http://www.cisco.com/support/bugtools

Related Documentation

The following sections describe the documentation available for the Cisco VG200. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents.

Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online on CCO and the Documentation CD-ROM.

Use these release notes with these documents:

• Release-Specific Documents
  
  
• Platform-Specific Documents
  
  
• Cisco IOS Software Documentation Set
  
  

Release-Specific Documents

The following documents are specific to or support Cisco IOS Release 12.1(3) and are located on CCO and the Documentation CD-ROM:

• Cross-Platform Release Notes for Cisco IOS Release 12.1.3(T)
  
  

On CCO, begin under the Service & Support heading and follow this path:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Release Notes: Cross-Platform Release Notes for Cisco IOS Release 12.1.3(T)

Follow this path on the Documentation CD-ROM:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Release Notes: Cross-Platform Release Notes for Cisco IOS Release 12.1.3(T)

• Product bulletins, field notices, and other release-specific documents
  
  

To reach these documents, refer to the Technical Documents link under Service & Support section on CCO. The product bulletin for Release 12.1(1)XE can be found on the following path:

Technical Documents: Product Bulletins: Software: Cisco IOS 12.1: Cisco IOS Software Release 12.1(1)XE

• Caveats for Cisco IOS Release 12.1.3(T)
  
  

On CCO, begin under the Service & Support heading and follow this path:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Caveats: Caveats for Cisco IOS Release 12.1.3(T)

Follow this path on the Documentation CD-ROM:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS 12.1.3(T): Caveats: Caveats for Cisco IOS Release 12.1.3(T)

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Note   If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. Click on this path: Software Center: Cisco IOS Software: Cisco IOS Bug Toolkit: Cisco Bug Navigator II. You can also find Bug Navigator II at http://www.cisco.com/support/bugtools

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Platform-Specific Documents

These documents are available for the Cisco VG200 on CCO and the Documentation CD-ROM:

• Hardware Configuration Guide for the Cisco VG200
  
  
• Software Configuration Guide for the Cisco VG200
  
  
• Regulatory Compliance and Safety Information for the Cisco VG200
  
  

On CCO, begin under the Service & Support heading and follow this path:

Technical Documents: Documentation Home Page: Voice Products: Gateways: Cisco VG200

Follow this path on the Documentation CD-ROM:

Cisco Product Documentation: Voice Products: Gateways: Cisco VG200

Cisco IOS Software Documentation Set

The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents which are shipped with your order in electronic form on the Documentation CD-ROM—unless you specifically ordered the printed versions.

Documentation Modules

Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.

On CCO and the Documentation CD-ROM, two master hot-linked documents provide information for the Cisco IOS software documentation set.

On CCO, beginning under the Service & Support heading:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Configuration Guides and Command References: Cisco IOS Interface Configuration Guide or Cisco IOS Interface Command Reference

On the Documentation CD-ROM at:

Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Configuration Guides and Command References: Cisco IOS Interface Configuration Guide or Cisco IOS Interface Command Reference

Release 12.1.3(T) Documentation Set

Table 3 describes the contents of the Cisco IOS Release 12.1.3(T) software documentation set, which is available in electronic form and in printed form upon request.

Note   You can find the most current Cisco IOS documentation on CCO and the Documentation CD-ROM. These electronic documents may contain updates and modifications made after the hard-copy documents were printed.

You can reach the Cisco IOS documentation set on CCO, beginning under the Service & Support heading:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Configuration Guides and Command References

You can reach the Cisco IOS documentation set on the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1.3(T): Configuration Guides and Command References

Note   Cisco Management Information Base (MIB) User Quick Reference is no longer published. For the latest list of MIBs supported by Cisco, see Cisco Network Management Toolkit on Cisco Connection Online. From CCO, click on the following path: Service & Support: Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB.

Software Configuration Tips on the Cisco TAC Home Page

If you have a CCO login account, you can access the Cisco Technical Assistance Center (TAC) at the following URL, which contains links and tips on configuring your Cisco products:

http://www.cisco.com/public/technotes/serv_tips.shtml

This URL is subject to change without notice. If it changes, point your Web browser to CCO  and click on this path: Products & Technologies: Products: Technical Tips.

The following sections are provided from the Technical Tips page:

• Field Notices—Notifies you of any critical issues regarding Cisco products and includes problem descriptions, safety or security issues, and hardware defects.
  
  
• Frequently Asked Questions—Describes the most frequently asked technical questions about Cisco hardware and software.
  
  
• Hardware—Provides technical tips related to specific hardware platforms.
  
  
• Hot Tips—Describes popular tips and hints gathered from the Cisco Technical Assistance Center (TAC). Most of these documents are available from the TAC Fax-on-demand service. To reach Fax-on-demand and receive documents at your fax machine from the United States, call 888-50-CISCO (888-502-4726). From other areas, call 650-596-4408.
  
  
• Internetworking Features—Lists tips on using and deploying Cisco IOS software features and services.
  
  
• Sample Configurations—Provides actual configuration examples that are complete with topology and annotations.
  
  
• Software Products—Contains Cisco IOS Software Bulletins, Cisco TCP/IP Suite 100, General Cisco IOS, Internet/Intranet Applications and Software, Network Management, Network Protection Software Tips, and WAN Switching Products and Software.
  
  
• Special Collections—Lists other helpful documents, including Case Studies, References & Request for Comments (RFCs), and Security Advisories.
  
  

Obtaining Documentation

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com.

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/pcgi-bin/subcat/kaojump.cgi.

Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).

Obtaining Technical Assistance

Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed docs, or by sending mail to Cisco.

Cisco Connection Online

Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.

You can access CCO in the following ways:

• WWW: www.cisco.com
  
  
• Telnet: cco.cisco.com
  
  
• Modem using standard connection rates and the following terminal settings: VT100 emulation; 8 data bits; no parity; and 1 stop bit.
  
  
  • From North America, call 408 526-8070
    
    
  • From Europe, call 33 1 64 46 40 82
    
    

You can e-mail questions about using CCO to cco-team@cisco.com.

Technical Assistance Center

The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.

To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.

To contact by e-mail, use one of the following:

In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:

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