Guest

Cisco Unified IP Phone 7900 Series

Cisco Unified IP Phone 7961G/7961G-GE, 7941G/7941G-GE Release Notes for Firmware Rel 8.0(1) for Cisco Unified CallManager(SIP)

  • Viewing Options

  • PDF (281.2 KB)
  • Feedback
Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE Release Notes for Firmware Release 8.0(1) for Cisco Unified CallManager 5.0 (SIP)

Table Of Contents

Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE Release Notes for Firmware Release 8.0(1) for Cisco Unified CallManager 5.0 (SIP)

Contents

Related Documentation

New and Changed Information

DTMF Transport

Installation Notes

Firmware Upgrade Issues

Firmware Installation Notes

Important Notes

Failover Time Using TCP is Faster than Failover Time with UDP

Cisco Unified CallManager Load Server Setting for Firmware Upgrades

Secure PC Log Off in an 802.1X Network

Caveats

Open Caveats

Obtaining Documentation

Cisco.com

Product Documentation DVD

Ordering Documentation

Documentation Feedback

Cisco Product Security Overview

Reporting Security Problems in Cisco Products

Obtaining Technical Assistance

Cisco Technical Support & Documentation Website

Submitting a Service Request

Definitions of Service Request Severity

Obtaining Additional Publications and Information


Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE Release Notes for Firmware Release 8.0(1) for Cisco Unified CallManager 5.0 (SIP)


March 6, 2006


NoteThe 8.0(1) firmware release will not be made available on Cisco.com. Cisco recommends that you use the available 8.0(2) SR1 release. See the "Firmware Installation Notes" section for more information.

This SIP firmware was designed and tested to interoperate with Cisco call control, most notably Cisco Unified CallManager 5.0. Although this SIP deployment is IETF RFC 3261 compliant, it is not supported by Cisco TAC or Cisco Engineering for use with non-Cisco call control systems.


Use these release notes with the Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE running SIP firmware release 8.0(1) and Cisco Unified CallManager Version 5.0.

You might need to notify your users about some of the information provided in this document.

Contents

These release notes provide the following information.

Related Documentation

New and Changed Information

Installation Notes

Important Notes

Caveats

Obtaining Documentation

Documentation Feedback

Cisco Product Security Overview

Obtaining Technical Assistance

Obtaining Additional Publications and Information

Related Documentation

Cisco Unified IP Phone Documentation

Refer to publications that are specific to your language, phone model and
Cisco Unified CallManager version. Navigate from the following documentation URL:

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_ipphon/index.htm

Cisco Unified CallManager Documentation

Refer to the Cisco Unified CallManager Documentation Guide and other publications specific to your Cisco Unified CallManager version. Navigate from the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/index.htm

New and Changed Information

Cisco Unified IP Phone firmware release 8.0(1) for SIP phones supports Cisco Unified CallManager 5.0. For a complete list of new and changed phone features introduced in this Cisco Unified CallManager version, refer to the Release Notes for Cisco Unified CallManager 5.0. See "Related Documentation" section for help locating these documents.

DTMF Transport

Cisco Unified IP Phone firmware release 8.0(1) supports DTMF Transport. DTMF Transport transmits RTP packets in band for each a digit pressed during a call, according to RFC2833. This feature allows an SCCP endpoint to interwork with a SIP endpoint or gateway.

Installation Notes

This sections contains these topics:

Firmware Upgrade Issues

Firmware Installation Notes

Firmware Upgrade Issues

If you are currently running firmware 6.0(2) to 7.0(2) on a Cisco Unified IP Phone 7961G/7961G-GE or 7941G/7941G-GE and want to upgrade to 8.0(x), be aware that upgrading will take up to twice as long to complete as usual.

Firmware Installation Notes

Before using the Cisco Unified IP Phone 7961G/7961G-GE or 7941G/7941G-GE with Cisco Unified CallManager release 5.0, you must install the latest firmware on all Cisco Unified CallManager servers in the cluster.

The 8.0(1) firmware release has been made available on Cisco Unified CallManager installation CDs; however, it will not be made available on Cisco.com due to additional bugs filed during final testing. Cisco recommends that you instead use the updated 8.0(2) SR1 firmware load, which is now available on Cisco.com. This recommendation is limited to this specific firmware release and has no bearing on any other software or firmware available on Cisco Unified CallManager CDs.

The name of the SIP 8.0(2) SR1 installation program for the Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE on Cisco Unified CallManager 5.0 is:

cmterm-7941_7961-sip.8-0-2SR1.cop

The readme file that contains installation instructions is:

cmterm-7941_7961-sip.8-0-2SR1-readme.htm

Both of these 8.0(2) SR1 files can be downloaded from this location on Cisco.com:

http://www.cisco.com/cgi-bin/tablebuild.pl/ip-7900ser


NoteIf you are upgrading from an earlier firmware version, see the "Firmware Upgrade Issues" section before upgrading.

Cisco recommends installing 8.0(2) SR1 instead of 8.0(1), as explained earlier in this section.


Important Notes

This section contains these topics:

Failover Time Using TCP is Faster than Failover Time with UDP

Cisco Unified CallManager Load Server Setting for Firmware Upgrades

Secure PC Log Off in an 802.1X Network

Failover Time Using TCP is Faster than Failover Time with UDP

You can configure SIP profiles for the Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE to operate with TCP or UDP by using the SIP Phone Security Profile Configuration window in Cisco Unified CallManager Administration. If you select TCP as a transport protocol, the failover time between primary, secondary and tertiary Cisco Unified CallManagers is approximately 5 seconds or less. If you select UDP, the failover time is approximately 120 seconds. The failover time is the maximum time that the phone waits before it can detect Cisco Unified CallManager failure status. The difference in the failover times is due to the behavior of TCP and UDP and not a defect on the Cisco Unified IP Phones or Cisco Unified CallManager.

Cisco Unified CallManager Load Server Setting for Firmware Upgrades

Cisco Unified CallManager Administration contains a setting to optimize installation time for phone firmware upgrades.


Note The setting is intended for future use, and is not yet a supported feature.


The Load Server setting is visible on the Phone Configuration page (Product Specific Configuration section) in the Cisco Unified CallManager Administration application. This setting lets you specify another TFTP server IP address or name (other than the TFTP Server 1 or TFTP Server 2) from which the phone firmware can be retrieved for upgrades on the phones. When the Load Server is set, the phone contacts the designated server for the firmware upgrade.


NoteIf the firmware load is not found on the Load Server, the phone does not upgrade and is not redirected to the TFTP Server 1 or TFTP Server 2.

On a factory reset or during a software recovery operation, the phone may fall back to using TFTP Server 1 or TFTP Server 2 to recover the phone load. In these scenarios, the phone will recover the phone load either via the term61.default.loads or term41.default.loads file, or it will attempt to recover the phone load based on its load.hist file.

If the phone is auto-registering with Cisco Unified CallManager for the first time, the phone will request the phone load via TFTP Server 1 or TFTP Server 2. This will only occur once when the phone is first installed into the system. This can be mitigated by preloading the phones with the correct firmware so that no firmware upgrade is required in combination with the auto-registration, or by auto-registering the phones at the main site prior to deployment at a remote site.


You can view the Load Server setting on the phone from Settings > Device Configuration > Network Configuration > Load Server. If the value in the Load Server setting is invalid, a "Load Server is invalid" message is displayed on the phone in Settings > Status > Status Messages.

Secure PC Log Off in an 802.1X Network

Firmware release 8.0(1) provides support for a Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE to monitor IEEE 802.1X messages between an authenticating switch and a connected PC (supplicant).

When a PC is disconnected from the Cisco IP Phone, the phone issues an EAPOL-Logoff message on behalf of the PC to the authenticating switch. The proxy EAPOL-Logoff message causes the authenticating switch to set the port to an unauthenticated state.

If you have an 802.1X network and upgrade to Cisco Unified IP Phone firmware release 7.0(2) or greater, be aware that you must re-authenticate a PC that is connected to a Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE.

For more information about 802.1X re-authentication, refer to the Cisco Catalyst switch configuration guides at:

http://www.cisco.com/en/US/products/hw/switches/tsd_products_support_category_home.html

Caveats

Known problems (bugs) are graded according to severity level. These release notes contain descriptions of:

All severity level 1 or 2 bugs.

Significant severity level 3 bugs.

You can search for problems by using the Cisco Software Bug Toolkit.

To access Bug Toolkit, you need the following items:

Internet connection

Web browser

Cisco.com user ID and password

To use the Software Bug Toolkit, follow these steps:

Procedure


Step 1 To access the Bug Toolkit, go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl.

Step 2 Log on with your Cisco.com user ID and password.

Step 3 Click the Launch Bug Toolkit hyperlink.

Step 4 To look for information about a specific problem, enter the bug ID number in the "Enter known bug ID" field and click Search.


Open Caveats

Table 1 lists Severity 1, 2, and 3 defects that are open for the Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Firmware Release 8.0(1).

For more information about an individual defect, you can access the online record for the defect by clicking the Identifier or going to the URL shown. You must be a registered Cisco.com user to access this online information.

Because defect status continually changes, be aware that Table 1 reflects a snapshot of the defects that were open at the time this report was compiled. For an updated view of open defects, access Bug Toolkit as described in the "Caveats" section.

Table 1 Open Caveats for Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Firmware Release 8.0(1) 

Identifier
Headline and Bug Toolkit Link

CSCsb11707

PLAR causes a short dialtone prior to an INVITE message being sent.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsb11707

CSCsb17473

Call instance number is skipped when speed dial is used.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsb17473

CSCsb77075

Corporate directory search fails when using Russian locale.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsb77075

CSCsb78781

The phone issues a BYE message instead of a 488 message if it does not accept a reInvite with SDP body.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsb78781

CSCsc06398

The phone uses HTTP cookies received from Cisco Unified CallManager while communicating with another server.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc06398

CSCsc13134

Phone downloads image multiple times during a reboot.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc13134

CSCsc46668

SIP phones display "from anonymous" instead of "private" from restricted calls.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc46668

CSCsc47974

The phone might hang when pressing keys during an observed held call.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc47974

CSCsc50496

SIP phones are slow to respond to invite messages.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc50496

CSCsc71763

The SSHD process hangs after connections are abnormally terminated.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc71763

CSCsc79774

The phone cannot recover after a DNS entry has been corrected.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc79774

CSCsc83609

The phone does not cut the dial tone when the first digit is entered.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc83609

CSCsc86483

Conference tones are only heard by the conference controller.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc86483

CSCsc96389

SIP phones do not check errors in the MWI Notify message.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc96389

CSCsc96462

Files created by SIP runtime are not cleared on factory reset.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc96462

CSCsc96491

The phone accepts an MWI Notify message even if the message is not destined to it.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc96491

CSCsc98937

SIP phones accept duplicate IP addresses.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc98937

CSCsc99065

SIP might incorrectly detect the SDP has changed.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc99065

CSCsc99166

SIP phones experience initial voice clipping.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsc99166

CSCsd01353

The phone displays "reorder" in english when the phone is set to Japanese locale.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd01353

CSCsd02600

You can change ring volume even when the setting access is set to disabled.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd02600

CSCsd02671

CTI MONITORDIGITS event not returned when ABCD DTMF digits are received.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd02671

CSCsd04208

When a shared line is used with a restricted number, the SIP phone will still display the party number.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd04208

CSCsd04464

Non-secure phones are allowed to barge into an encrypted call.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd04464

CSCsd04595

Pressing the Resume key on a held shared line after cBarge does not resume the call.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd04595

CSCsd05406

Phone completes attended call transfer feature when the New Call softkey is selected.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd05406

CSCsd05954

Call preservation does not work during a Cisco Unified CallManager upgrade.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd05954

CSCsd06032

Interdigit timeout is not reset after each digit is selected.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd06032

CSCsd06345

SIP phones register to tertiary when primary Cisco Unified CallManager is restarted.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd06345

CSCsd08161

The LEDs do not blink with the factory reset sequence.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd08161

CSCsd09000

Phone might be out of memory if "Key not active" is displayed after a digit key press.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd09000

CSCsd09042

The phone cannot boot up when auto registration is turned off in Cisco Unified CallManager.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd09042

CSCsd09430

The phone will continue to respin when the DHCP response has no TFTP entry.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd09430

CSCsd10484

The transferee phone continues to hear ringback tone after early attended transfer is abandoned.

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsd10484


Obtaining Documentation

Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.

Cisco.com

You can access the most current Cisco documentation at this URL:

http://www.cisco.com/techsupport

You can access the Cisco website at this URL:

http://www.cisco.com

You can access international Cisco websites at this URL:

http://www.cisco.com/public/countries_languages.shtml

Product Documentation DVD

The Product Documentation DVD is a comprehensive library of technical product documentation on a portable medium. The DVD enables you to access multiple versions of installation, configuration, and command guides for Cisco hardware and software products. With the DVD, you have access to the same HTML documentation that is found on the Cisco website without being connected to the Internet. Certain products also have .PDF versions of the documentation available.

The Product Documentation DVD is available as a single unit or as a subscription. Registered Cisco.com users (Cisco direct customers) can order a Product Documentation DVD (product number DOC-DOCDVD= or DOC-DOCDVD=SUB) from Cisco Marketplace at this URL:

http://www.cisco.com/go/marketplace/

Ordering Documentation

Registered Cisco.com users may order Cisco documentation at the Product Documentation Store in the Cisco Marketplace at this URL:

http://www.cisco.com/go/marketplace/

Nonregistered Cisco.com users can order technical documentation from 8:00 a.m. to 5:00 p.m. (0800 to 1700) PDT by calling 1 866 463-3487 in the United States and Canada, or elsewhere by calling 011 408 519-5055. You can also order documentation by e-mail at tech-doc-store-mkpl@external.cisco.com or by fax at 1 408 519-5001 in the United States and Canada, or elsewhere at 011 408 519-5001.

Documentation Feedback

You can rate and provide feedback about Cisco technical documents by completing the online feedback form that appears with the technical documents on Cisco.com.

You can submit comments about Cisco documentation by using the response card (if present) behind the front cover of your document or by writing to the following address:

Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Cisco Product Security Overview

Cisco provides a free online Security Vulnerability Policy portal at this URL:

http://www.cisco.com/en/US/products/products_security_vulnerability_policy.
html

From this site, you will find information about how to:

Report security vulnerabilities in Cisco products.

Obtain assistance with security incidents that involve Cisco products.

Register to receive security information from Cisco.

A current list of security advisories, security notices, and security responses for Cisco products is available at this URL:

http://www.cisco.com/go/psirt

To see security advisories, security notices, and security responses as they are updated in real time, you can subscribe to the Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed. Information about how to subscribe to the PSIRT RSS feed is found at this URL:

http://www.cisco.com/en/US/products/products_psirt_rss_feed.html

Reporting Security Problems in Cisco Products

Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. If you think that you have identified a vulnerability in a Cisco product, contact PSIRT:

For Emergencies only — security-alert@cisco.com

An emergency is either a condition in which a system is under active attack or a condition for which a severe and urgent security vulnerability should be reported. All other conditions are considered nonemergencies.

For Nonemergencies — psirt@cisco.com

In an emergency, you can also reach PSIRT by telephone:

1 877 228-7302

1 408 525-6532


Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product (for example, GnuPG) to encrypt any sensitive information that you send to Cisco. PSIRT can work with information that has been encrypted with PGP versions 2.x through 9.x.

Never use a revoked or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one linked in the Contact Summary section of the Security Vulnerability Policy page at this URL:

http://www.cisco.com/en/US/products/products_security_vulnerability_policy.
html

The link on this page has the current PGP key ID in use.

If you do not have or use PGP, contact PSIRT at the aforementioned e-mail addresses or phone numbers before sending any sensitive material to find other means of encrypting the data.


Obtaining Technical Assistance

Cisco Technical Support provides 24-hour-a-day award-winning technical assistance. The Cisco Technical Support & Documentation website on Cisco.com features extensive online support resources. In addition, if you have a valid Cisco service contract, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not have a valid Cisco service contract, contact your reseller.

Cisco Technical Support & Documentation Website

The Cisco Technical Support & Documentation website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, at this URL:

http://www.cisco.com/techsupport

Access to all tools on the Cisco Technical Support & Documentation website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:

http://tools.cisco.com/RPF/register/register.do


Note Use the Cisco Product Identification (CPI) tool to locate your product serial number before submitting a web or phone request for service. You can access the CPI tool from the Cisco Technical Support & Documentation website by clicking the Tools & Resources link under Documentation & Tools. Choose Cisco Product Identification Tool from the Alphabetical Index drop-down list, or click the Cisco Product Identification Tool link under Alerts & RMAs. The CPI tool offers three search options: by product ID or model name; by tree view; or for certain products, by copying and pasting show command output. Search results show an illustration of your product with the serial number label location highlighted. Locate the serial number label on your product and record the information before placing a service call.


Submitting a Service Request

Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco engineer. The TAC Service Request Tool is located at this URL:

http://www.cisco.com/techsupport/servicerequest

For S1 or S2 service requests, or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.

To open a service request by telephone, use one of the following numbers:

Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447

For a complete list of Cisco TAC contacts, go to this URL:

http://www.cisco.com/techsupport/contacts

Definitions of Service Request Severity

To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.

Severity 1 (S1)—An existing network is down, or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operations are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Severity 3 (S3)—Operational performance of the network is impaired, while most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

The Cisco Product Quick Reference Guide is a handy, compact reference tool that includes brief product overviews, key features, sample part numbers, and abbreviated technical specifications for many Cisco products that are sold through channel partners. It is updated twice a year and includes the latest Cisco offerings. To order and find out more about the Cisco Product Quick Reference Guide, go to this URL:

http://www.cisco.com/go/guide

Cisco Marketplace provides a variety of Cisco books, reference guides, documentation, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:

http://www.cisco.com/go/marketplace/

Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:

http://www.ciscopress.com

Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can access Packet magazine at this URL:

http://www.cisco.com/packet

Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:

http://www.cisco.com/ipj

Networking products offered by Cisco Systems, as well as customer support services, can be obtained at this URL:

http://www.cisco.com/en/US/products/index.html

Networking Professionals Connection is an interactive website for networking professionals to share questions, suggestions, and information about networking products and technologies with Cisco experts and other networking professionals. Join a discussion at this URL:

http://www.cisco.com/discuss/networking

World-class networking training is available from Cisco. You can view current offerings at this URL:

http://www.cisco.com/en/US/learning/index.html