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Cisco Broadband Troubleshooter 3.0 (CBT 3.0) is an easy-to-use troubleshooting tool designed for the network administrator and radio frequency (RF) technician at a multiple system operator (MSO). An MSO provides a variety of cable services such as TV, data, or voice telephony. The network administrator and the RF technician use Cisco Broadband Troubleshooter to resolve RF problems in the MSO's cable plant.
This document describes known issues for CBT 3.0 and instructions for working around them.
The last release prior to Cisco Broadband Troubleshooter 3.0 is 2.3. Since that release, Cisco Broadband Troubleshooter 3.0 includes the following changes:
http:// CBT server address:9080/CBTAdminFrames.html
http:// CBT server address:9080/RFTechFrames.html
http:// CBT server address:9080
http:// CBT server address:9080/CBTHomePage.html
This section contains an explanation of any known issues in Cisco Broadband Troubleshooter 3.0 and directions for working around them.
If the issue is in Cisco's Distributed Defect Tracking System (DDTS), the DDTS Number is provided. This is a unique identifier assigned to the issue. For all issues, the following information is provided:
If the CBT 3.0 server uses a Windows operating system, and you want to run CCDM on the same server, you must install CCDM first and CBT 3.0 second.
When using the Spectrogram or the Continuous Sweep feature in the Trace Window, the window may stop updating after a period of time.
When using the Spectrogram or the Continuous Sweep feature in the Trace Window, you might notice that the window stops updating after a period of time. A dialog that contains one of the following errors appears:
These errors are generated by the cable modem termination system (CMTS) and are reported in the CBT 3.0 error dialog.
You can correct an error as follows:
Alternatively, the problem could be that too many spectrum data requests have been launched in the CMTS. Eliminate some spectrum data requests by closing Spectrograms or Trace Windows.
Alternatively, the problem could be that too many spectrum data requests have been launched in the CMTS. Eliminate some spectrum data requests by closing Spectrograms or Trace Windows.
To restart the window, click OK in the error dialog. Next, click Resume in the Spectrogram or click Continuous Sweep Start in Trace Window.
When measuring the upstream burst power, there may be maximum 3 dBmV difference between a vector signal analyzer device and the Trace Window reading, depending on the symbol rate and channel frequency span location.
The inaccuracy increases when the channel is configured near the start frequency or end frequency. In general, the power reading is more accurate near the frequency at which the card is calibrated.
In the Trace Window, a single tone signal that resembles a noise burst appears to be shifted in frequency when compared to the output of a spectrum analyzer device. The frequency offset varies as the resolution bandwidth (RBW) changes. In general, the smaller the RBW, the more accurate the frequency is.
If a noise burst occurs at a frequency between two spectrum data points determined by the start and stop frequencies and RBW, the DSP sums the power of the noise burst to the nearest frequency point according to the RBW. As a result, this elevated power level appears as shifted by a certain delta frequency when compared to the spectrum analyzer output.
On Linux RedHat 7.3, with Netscape 4.7 and JRE 1.1.5 (the default JRE), the browser will sometimes hang when you access the CBT login page.
CBT 3.0 does not support this browser and JRE combination on Linux. A user guide section, "Supported Browser and Java Runtime Environment Combinations," says it is supported, which is incorrect.
If you are using Linux with Netscape 4.7, you need JRE 1.4.1. Using Netscape 7.0 with JRE 1.4.1 (the default JRE) is recommended.
If the network connection has a problem while you are running the Trace Window in Continuous Sweep mode, an error dialog appears and the Trace Window stops running.
Click OK in the dialog and then click Continuous Sweep Start in the Trace Window to continue.
In addition to these release notes, CBT 3.0 has the following documentation:
Cisco provides several ways to obtain documentation, technical assistance, and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
You can access the most current Cisco documentation on the World Wide Web at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
International Cisco websites can be accessed from this URL:
http://www.cisco.com/public/countries_languages.shtml
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which may have shipped with your product. The Documentation CD-ROM is updated regularly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual or quarterly subscription.
Registered Cisco.com users can order a single Documentation CD-ROM (product number DOC-CONDOCCD=) through the Cisco Ordering tool:
http://www.cisco.com/en/US/partner/ordering/ordering_place_order_ordering_tool_launch.html
All users can order annual or quarterly subscriptions through the online Subscription Store:
http://www.cisco.com/go/subscription
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
http://www.cisco.com/en/US/partner/ordering/index.shtml
You can submit comments electronically on Cisco.com. On the Cisco Documentation home page, click Feedback at the top of the page.
You can send your comments in e-mail to bug-doc@cisco.com.
You can submit comments 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
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the Cisco Technical Assistance Center (TAC) provides 24-hour, award-winning technical support services, online and over the phone. Cisco.com features the Cisco TAC website as an online starting point for technical assistance.
The Cisco TAC website (http://www.cisco.com/tac ) provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco TAC website is available 24 hours a day, 365 days a year.
Accessing all the tools on the Cisco TAC website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a login ID or password, register at this URL:
http://tools.cisco.com/RPF/register/register.do
The online TAC Case Open Tool (http://www.cisco.com/tac/caseopen ) is the fastest way to open P3 and P4 cases. (Your network is minimally impaired or you require product information). After you describe your situation, the TAC Case Open Tool automatically recommends resources for an immediate solution. If your issue is not resolved using these recommendations, your case will be assigned to a Cisco TAC engineer.
For P1 or P2 cases (your production network is down or severely degraded) or if you do not have Internet access, contact Cisco TAC by telephone. Cisco TAC engineers are assigned immediately to P1 and P2 cases to help keep your business operations running smoothly.
To open a case 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 listing of Cisco TAC contacts, go to this URL:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
To ensure that all cases are reported in a standard format, Cisco has established case priority definitions.
Priority 1 (P1)—Your 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.
Priority 2 (P2)—Operation of an existing network is severely degraded, or significant aspects of your business operation 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.
Priority 3 (P3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Priority 4 (P4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
http://www.cisco.com/en/US/products/products_catalog_links_launch.html
http://www.cisco.com/go/packet
http://www.cisco.com/go/iqmagazine
http://www.cisco.com/en/US/about/ac123/ac147/about_cisco_the_internet_protocol_journal.html
http://www.cisco.com/en/US/learning/index.html
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2003 Cisco Systems, Inc. All rights reserved.
Posted: Mon Aug 18 12:50:05 PDT 2003
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