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Product Numbers: AS52-12-M-56K=, AS52-24B-M-56K=, AS52-12-M-56K-UPG=
This document describes how to install 56K 12-port modules in Cisco AS5200 universal access servers, and includes the following sections:
The 56K 12-port module uses Rockwell's K56flex technology. The module can send data at up to 56 kbps and receive data at up to 33.6 kbps. However, the actual speed that you can achieve with the module depends on the condition of your local telephone network. Figure 1 shows the 56K 12-port module.
Note Actual speeds vary depending on line conditions. Due to FCC limitations, speeds in the U.S. are less than 56 kbps.
The following prerequisites apply to the 56K module:
Follow these guidelines to ensure general safety:
Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may harm you. A warning symbol precedes each safety warning.
Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Waarschuwing Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.
Varoitus Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).
Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.
Warnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.
Avvertenza Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.
Advarsel Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.
Aviso Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.
¡Advertencia! Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.
Varning! Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.
Follow these guidelines when working on equipment powered by electricity:
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when electronic printed circuit cards are improperly handled and can result in complete or intermittent failures. Always follow ESD prevention procedures when removing and replacing cards. Ensure that the chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground yourself by touching the metal part of the chassis.
The use of 56K modems introduces new steps for installing and configuring modem code. With some Cisco IOS releases, you must first install the 56K modem code (modem firmware and DSP software). The following steps provide an overview of the installation process:
1. Verify that the Cisco AS5200 is running Cisco IOS Release 11.2(8)P or later. If necessary, upgrade your system software.
2. Install the module, as described in the section "Installing the 56K 12-Port Module."
3. If necessary, upgrade the modem code, as described in the sections "Downloading Modem Code for Releases Requiring Two Files" or "Downloading Modem Code for Releases Requiring a Single File."
Note Depending on how often modem code images are downloading in to your boot Flash memory, the boot Flash memory in your Cisco AS5200 may not have the available space to accept the additional 56K images. If you experience this, refer to the section "Erase Boot Flash Memory and Restore the Boot Image,".
You must install 56K modules in a carrier card or a dual E1/PRI card, which are not included with this kit. The carrier card, shown in Figure 2, is a wide, narrow card with two slots in which you can install up to two 56K modules (or other supported modules). Figure 3 shows the dual E1/PRI card, which has only one slot. You can install 56K modules with any combination of other supported modules.
You will need the following tools:
Refer to Figure 4 and take these steps:
Step 1 Attach an ESD-preventive wrist strap.
Step 2 Power OFF the access server.
Step 3 Remove all interface cables from the back panel of the access server.
Step 4 Remove the blank cover or module installed in the carrier card or dual E1/PRI card.
Note If the carrier card or dual E1/PRI card is already installed in the access server, you can install 56K modules in the card without removing it from the chassis.
Step 5 Remove the 56K module from the ESD-preventive shipping material.
Step 6 Slide the 56K module into the carrier card or dual E1/PRI card slot until it is seated completely.
Step 7 Tighten the two captive screws on the 56K module to secure it to the carrier card or dual E1/PRI card.
If you have questions or need assistance, refer to the section "Cisco Connection Online" at the end of this document. Otherwise, proceed to one of these sections, "Downloading Modem Code for Releases Requiring Two Files" or "Downloading Modem Code for Releases Requiring a Single File."
The modem code download process depends on your Cisco IOS software release and your configuration. Select one of the following actions:
For instructions, see "Downloading Modem Code for Releases Requiring Two Files,".
Access servers running Cisco IOS Release 11.2(8)P, 11.2(9)P, 11.3(1)T (future), or 11.3(1) (future) and later must contain two compatible files:
First shipments of the 12-port module contained version 3.1.30 modem firmware. You must always download the compatible DSP software from the disk shipped with the module.
Table 1 describes the current firmware and software versions. In the middle column, note that the filenames are similar, which indicates that the files are compatible.
File Type | File Posted to Cisco's FTP Server | File Destination |
---|---|---|
56K Modem Firmware and DSP Software
You must download the files identified in Table 1 to a TFTP server on your LAN, then copy the files to the access server's boot Flash memory.
Choose a method to download the files:
Log in to Cisco's Software Center at the following URL to download both 56K files. You must log in as a Cisco registered user (nonregistered users must use the DSP software on the disk shipped with the module):
http://www.cisco.com/cgi-bin/tablebuild.pl/56K
Alternately, you can access Cisco at http://www.cisco.com, login, and take the following path to the files:
After the files are downloaded to your desktop computer, you must transfer them to a TFTP server on your network using an FTP application.
Take the following steps to download the 56K files mentioned above from Cisco's FTP server using an FTP client application. The steps assume that you want to download both the modem firmware and the DSP software. (For initial installations, only the DSP software is required. These instructions are provided for future versions of modem firmware.)
Note The directory path leading to the 56K images on cco.cisco.com is subject to change without notice. If you cannot access the files using an FTP application, use Download Method 1.
Step 2 Enter your CCO registered username and password (for example, harry and letmein):
Step 3 Specify the directory that holds the modem firmware and DSP software files, which is /cisco/access/5200/56k:
Step 4 View the contents of the directory with the ls command:
Step 5 Specify a binary image transfer:
Step 6 Copy the modem firmware and/or DSP software files from the server to your local environment with the get command. The filenames follow:
Note For initial installations, you will only need to copy the DSP software (mcom-modem-dsp-3.1.30-1.1.0.bin) because the modem firmware is installed on the module at the factory. When Cisco releases updated modem firmware in the future, use these instructions to download the files.
The following example downloads the DSP software file:
The following example downloads the modem firmware file:
Step 7 Quit your terminal session:
Step 8 If you have not already done so, you must now transfer these files to a local TFTP server that your Cisco AS5200 can access.
Note If you loaded Cisco IOS software from a feature pack CD-ROM, note that the CD contains a TFTP server program for PCs using Windows 95. Run the server program from the directory where you installed the Router Software Loader (RSL) program. Remember to set the Root directory to the directory where the AS5200 56K files are located. RSL is available on the software feature pack CD and on CCO in the software library in the Access Products section.
If you do not have access to the Cisco Software Center or the Cisco FTP server and decide to use the software on the disk shipped with your module, you must first copy the file mcom-modem-dsp-3.1.30-1.1.0.bin to your tftp server, then download the software to the modem using the method described in the next section "Upgrade the 56K Modems to the Latest 56K Modem Firmware ."
The procedure for copying the 56K modem firmware from a local TFTP server to the 56K modem's Flash memory is described in this section. Note that the firmware shipped with your 56K 12-port module matches the DSP software on the disk. This step is unnecessary with the 56K modem firmware version 3.1.30. As revised modem code is available, you can use the procedures in this section to upgrade the 56K modes to the latest version.
Before you back up your boot Flash image with the copy bootflash tftp command using a UNIX TFTP server, you must create an empty destination file on your local TFTP server:
Step 2 Go to your TFTP server and create an empty file using your boot image's filename, then change its permissions to be world writable:
The placeholder or destination file is now created and prepared for the backup copy operation. Proceed to the next section "Step 2Back Up the Boot Flash Image and Disable Modem Autoconfigure."
Perform the following steps on the Cisco AS5200:
Step 2 Enter global configuration mode and disable the modem autoconfigure command on the TTY lines that correspond with the 56K modems. Ignore this step if this command is not enabled in your system configuration. In the following example, one 12-port 56K modem card is installed in slot 2:
The boot image is now backed up and modem autoconfigure is disabled. Proceed to the next section "Step 3Upgrade to the Latest 56K Modem Firmware."
Step 2 Specify the range of 56K modems that you want to upgrade. This example shows the range of modems to be 2/12 through 2/23:
Step 3 Specify the name or address of the TFTP server holding the new modem firmware. Press the Return key to accept the default name or IP address enclosed in the brackets []. Also specify the source path/filename of the firmware.
The 56K modems are now upgraded to the latest version of modem firmware. Proceed to the next section "Copy the RAM-Based DSP Software ."
The procedure for copying the DSP software from to a local file server to the access server's boot Flash memory is described in this section:
These two steps are performed only once. Although the DSP software runs from RAM, the Cisco IOS software automatically copies the DSP code from boot Flash memory to the 56K modems each time the access server power cycles in the future. After you copy the DSP software filename into boot Flash memory for the first time, you should not have to perform these steps again.
Step 2 Specify the address or name of the server that currently holds the DSP software. You must also specify the source path/filename of the DSP software and the destination filename. The system software proposes a destination filename for you, which is enclosed in square brackets []. Press the Return key to accept the default destination name.
Step 3 When the system asks to confirm erasing the Flash memory device before copying the DSP file, enter no. You will now see a warning message appear that says the DSP file cannot be executed on the system (unlike a feature set or system image). Ignore this message.
Step 4 Initiate the copy operation by entering y then pressing the Return key at the [confirm] prompt:
Step 5 Continue with the copy operation by entering yes and pressing the Return key:
Now the DSP software is in the access server's boot Flash memory. Proceed to the next section, "Step 2Copy the DSP Software Filename to the 56K Modems" for step-by-step instructions on how to transfer the DSP image to the 56K modems.
Step 2 Specify the filename of the DSP software and press the Return key. Note that the filename must be preceded by bootflash:, which is necessary to address the file that is stored in boot Flash memory.
Step 3 Proceed with the DSP download by entering y and pressing the Return key:
Note Now the 56K modems are equipped with the DSP software. The modems are configured to transmit at speeds up to 56 kbps. Each time the access server is power cycled, the system software automatically loads the 56K modems with the DSP software in boot Flash memory. If you erase the DSP software file from boot Flash memory, the 56K modems will revert to V.34 operation on the next power cycle.
Step 4 Verify that the DSP software copied to the 56K modems with the show modem version command. In this example, modems 2/12 through 2/23 are loaded with the new DSP software:
Cisco IOS Release 11.2(10)P or later and Cisco IOS Release 11.3(2)T (future) or later support bundled modem code for the 12-port module. This modem code image is in a single-file format and consists of the following files:
Modem code can reside on the access server in two locations: one version is bundled with Cisco IOS software, and another version can exist in boot Flash memory. This modem code residing in boot Flash memory is a single file comprised of the modem firmware image combined with the DSP software image.
After power on, Cisco IOS software uses its bundled modem code file or the existing modem code file in boot Flash memory to automatically update the DSP software. This means that after you install or replace a 12-port module, you can allow the system software to download compatible DSP software and then proceed directly to the configuration steps (page 29). However, because you can control the version of modem code used by the modems, the remainder of this section provides information about how Cisco IOS software processes modem code updates and how you can load a different version than the one automatically selected.
Note Systems running Cisco IOS Release 11.2(10)P or later or Cisco IOS Release 11.3(2)T (future) or later have bundled modem code and do not require download of the modem code shipped on the disk with the module. However, the disk may contain a later version of modem code than the version bundled with Cisco IOS software. You have the option of downloading this version and overriding the version selected by Cisco IOS software.
When you install a new 12-port module, Cisco IOS software examines the following versions of modem code:
Then, Cisco IOS software ensures that the system uses matching DSP software and modem firmwarewhich may include overriding the current firmware on the modem. In some circumstances you may decide to manually update the modem code after the automatic download process completes.
Because of the possibility of multiple versions of modem code and the way Cisco IOS software processes these versions, Cisco suggests that you decide between the following two strategies:
To help with the decision, Figure 5 shows a hypothetical release process. We recommend that you use the modem code bundled with Cisco IOS software because it is the easier strategy and enables you to take advantage of new modem code whenever you upgrade your Cisco IOS software. You can also control the modem code move directlyuse the copy command as discussed later.
When you add or replace a 12-port module, Cisco IOS software handles the initial modem code download. However, you may decide to download a different version from the one selected by software. Because Cisco IOS software maps modem code (either the bundled Cisco IOS version or a boot Flash memory version) to a given slot/port and not the physical modem, Cisco IOS software will automatically load the modem code mapped to the previous module (for more information, see the description of mapping in Table 4). Whenever Cisco IOS software recognizes the modem code as invalid, it uses the bundled version.
Table 2 provides scenarios that occur when you upgrade Cisco IOS software or modem code.
No. | Scenario | Update Process |
---|---|---|
You update Cisco IOS software, and you decide to use the version of modem code selected by Cisco IOS software. |
||
You update Cisco IOS software, and you decide not to use the modem code selected by Cisco IOS software. |
||
The modems are running a version of modem code from boot Flash memory that is different than the version bundled with Cisco IOS software. You decide to revert to the bundled version. |
See "Using the Modem Code Bundled with Cisco IOS Software,". |
|
Cisco releases new modem code, which is a later version than the version currently running on the modems. You decide to use Cisco's newest modem code.2 |
1In part, Cisco IOS software bases this decision on the last copy command issued. For more details about mapping, see Table 4.
2Cisco ships new modem code on a disk packed with the 12-port module. |
Figure 6 shows a location on the release timeline where updates might take place, and Table 3 explains the resulting versions of Cisco IOS software and modem code.
1This example assumes the last copy command was copy flash modem, and Modem Code Version 1 was specified.
2You upgraded Cisco IOS code only; therefore, the modem code remains as Version 4 (upgraded in Step 3). 3You upgraded to the Modem Mode Version 3, which was bundled with Cisco IOS Release D. |
Table 4 provides a list of terms and commands and a description of how they are used in the modem code update process.
Use the procedures in this section to transfer modem code from Cisco Connection Online (CCO) to the integrated modems on the 12-port module. The procedure consists of the following tasks:
You can download the single file (mcom-modem-code-x.x.x.bin) to a TFTP server on your LAN two ways:
Log in to Cisco's Software Center at the following URL to download the modem code file. You must log in as a Cisco registered user. (If you are not a registered user, note that Cisco provides modem code on a disk when are updates are necessary. This disk is shipped with the 12-port module.)
After downloading to your desktop computer, you must transfer it to a TFTP server on your network using an FTP application.
Alternatively, you can access Cisco at http://www.cisco.com, login, and take the following path to the file:
Take the following steps to download the modem code file from Cisco's FTP server using an FTP client application. These steps assume that you want to download both the modem firmware and the DSP software.
Note The directory path leading to the 56K images on cco.cisco.com is subject to change without notice. If you cannot access the files using an FTP application, use Download Method 1.
Step 2 Enter your CCO registered username and password (for example, harry and letmein):
Step 3 Specify the directory that holds the modem code file, which is /cisco/access/5200:
Step 4 View the contents of the directory with the ls command:
Step 5 Specify a binary image transfer:
Step 6 Copy the modem code file from the server to your local environment with the get command. The filename is mcom-modem-code-3.1.30.bin.
The following example downloads the modem code file:
Step 7 Quit your terminal session:
Step 8 Verify that you successfully transferred the modem code file to your local directory:
Step 9 If you have not already done so, transfer this file to a local TFTP server that your Cisco AS5200 can access.
Note In some cases, Cisco ships modem software on a disk. To use this software, first upload the
software to your TFTP server, then download the software to the modem using the method described
in the next section "Copying the Modem
Code File from a Local TFTP Server to the Modems."
If you loaded Cisco IOS software from a feature pack CD using Router Software Loader (RSL), note
that the CD contains a TFTP server program for PCs using Windows 95. Run the server program
from the directory where you installed the RSL program. Remember to set the Root directory to the
directory where the Cisco AS5200 56K modem code is located. RSL is also available on CCO in the
software library in the Access Products section.
The procedure for copying the modem code file from your local TFTP server to the access server boot Flash memory is a two-step process. First, transfer the code to the access server. Then, transfer the code to the modems.
These two steps are performed only once. After you copy the modem code file into boot Flash memory for the first time and map that file to a specific modem using the copy bootflash modem command, you do not have to perform these steps again. Because the DSP software runs from modem RAM, the Cisco IOS software must automatically copy the DSP software to each modem each time the access server power cycles.
Note A list of download failure reasons and recommended actions is provided in the section "Download Failure Reasons and Recommended Actions."
Step 2 Copy the modem code file to the modems by entering the copy bootflash modem Privileged EXEC command.
Note On the display, notice that the command copies the concatenated modem code file, mcom-modem-code-3.1.30.bin. When the DSP software and modem firmware download is complete, the display reports the modem firmware component, MNPClass10K56flexModemRev3.1.30/85, was downloaded to the modems.
If you want to verify that the DSP software and modem firmware copied to the modems, use the show modem version command. In this example, modems 2/12 through 2/23 are loaded with the modem controller firmware and DSP software:
Now the modems are equipped with code. The modems are configured to transmit at speeds up to 56 kbps. Each time the access server is power cycled, Cisco IOS software automatically loads the modems with the modem code in boot Flash memory. If you erase the modem code file from boot Flash memory, the Cisco IOS default modem code (that is, the bundled modem code) will be automatically downloaded to the modem.
If you already have a version of modem code in the Flash memory on your access server, and you upgrade to a Cisco IOS release that includes newer modem firmware, only the modems that are mapped to the bundled Cisco IOS version are updated. In order to set the modem firmware mapping to the firmware version bundled with Cisco IOS software, enter the following command:
Note This command does not affect any existing modem code that resides in boot Flash memory in case you later want to revert to it. If you decide to delete the code from boot Flash memory, remember that all files in boot Flash memory will be deleted, therefore save and restore any important files (for example, the Cisco IOS software image).
As a result of the copy system:/ucode/filename modem (or copy ios-bundled modem) command, future Cisco IOS upgrades will potentially result in the mapping of new Cisco IOS bundled firmware to the modems. (If the new Cisco IOS image contains the same modem code as the old one, no new code will be downloaded to the modems.)
Note To determine the version of modem code bundled with your Cisco IOS software, refer to the Cisco IOS release notes shipped with the chassis.
During the DSP download process, you may receive an error message if the download fails. See Table 5.
The boot Flash memory in your Cisco AS5200 may not have the available space to accept the additional 56K images or files. If you experience this, you must erase the entire boot Flash memory followed by restoring the boot image before performing the necessary 56K copy operations. Because the Cisco AS5200's Flash file system does not allow individual files to be erased from boot Flash memory, you must erase the entire contents of boot Flash memory at one time. To do this, refer to Table 6.
This section describes how to configure the Cisco AS5200 for 56K modems.
If you are experienced with the Cisco IOS software, refer to the "Configuration Example" section at the end of the following task tables for a working configuration example. Or take the steps described in the following task tables to configure the access server:
1PPP = Point-to-Point Protocol.
2CHAP = Challenge Handshake Authentication Protocol. 3PAP = Password Authentication Protocol. |
The following example shows the output of the show config command for a system configured with 56K modules. If you are experienced with the Cisco IOS software, you might find this a useful reference for configuration.
This concludes the procedure for configuring the access server for use with the 56K module. If you have questions or need assistance, refer to the last section "Cisco Connection Online."
The equipment described in this document generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco's installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.
You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:
Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.
Posted: Sun Jan 19 11:05:04 PST 2003
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