Table Of Contents
Related Features and Technologies
Supported Standards, MIBs, and RFCs
V.92 Quick Connect for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers
Feature History
This feature module introduces the V.92 International Telecommunication Union Telecommunication Standardization Sector (ITU-T) standard Quick Connect (QC) feature on NextPort/DFC108-bearing platforms using Cisco IOS Software Releases 12.2(2)XA, 12.2(2)XB, and 12.2(11)T.
This document includes the following sections:
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Supported Standards, MIBs, and RFCs
Feature Overview
V.92
To remain current with industry needs, the ITU-T V.90 modem standard recommendations have been enhanced. The new standard, V.92, meets the need for a digital modem and analog modem pair on the Public Switched Telephone Network (PSTN). V.92 improves the upstream data signaling rate and adds new features that enhance modem usability. These new modem protocols and standards are implemented at the modem level.
This feature module introduces the V.92 Quick Connect feature on Cisco AS5350, Cisco AS5400, and Cisco AS5850 universal gateways and Cisco AS5800 universal access servers.
Note
V.92 provides new modem protocols and standards that are implemented at the modem level.
NextPort firmware provides V.92 capabilities bundled with existing NextPort features. The NextPort Dial Feature Card (DFC-108NP) is responsible for the ITU implementation of V.92 and the collection of statistics related to the new features, including the new modem states that occur with the additional negotiations for V.92. The statistics are collected by the DFC but are passed to and stored in Cisco IOS software. Cisco IOS software is responsible for controlling the features and displaying the new statistics.
The Cisco AS5800 uses the NextPort high density dial termination card to implement this feature. Both voice and dial technologies are supported when used in a Cisco 5850 universal gateway.
Note
Quick Connect
V.92 Quick Connect speeds up the client-to-server startup negotiation, reducing the overall connect time up to 30 percent. The client modem retains line condition information and characteristics of the connection to the Internet service provider (ISP), which reduces connect time by avoiding some of the initial signal handshaking.
Disconnect reasons and modem states and statistics (link information) have been added or modified to support V.92 Quick Connect. Table 1 lists the new V.92 Quick Connect states, and Table 2 lists the new link information parameters.
Table 2 Quick Connect Link Information Parameters
QC Exchange
0: No QC
1: QC Requested
2: QC Short Train Fail
3: QC Full Train Success
4: QC Short Train Success
AT Commands and S-Registers
V.92 Quick Connect is enabled by default and is controlled with standard AT commands and S-registers. S29 is used to enable V.92 sequence detection and S63 is used to enable Quick Connect negotiation, both of which are enabled by default. The S63 S-register controls the feature through the ANSpcm signal. You can choose the power level of the ANSpcm signal, which defaults to -12dBm (the transmit power level for the United States). The ATSn=v and ATSn? AT commands are used to configure V.92 Quick Connect on NextPort platforms.
To disable V.92 Quick Connect or to set a different ANSpcm value, you can use a modemcap (for example, v92_v44:MSC=s62=8s63=0s21=15s29=12), or you can set the S29 register to any number other than 12. Table 3 lists the S-registers used to enable and disable the V.92 Quick Connect feature.
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Note
For detailed information about the AT commands and S-registers that are used to configure the V.92 Quick Connect feature supported by NextPort services, refer to the AT Command Set and Register Summary for NextPort Platforms.
Benefits
Improved Port Use
This feature improves ISP port usage because of the reduction in connect time.
Standard Modem Feature
V.92 is a standard modem feature that is offered as a no-cost upgrade to the installed system.
Restrictions
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Related Features and Technologies
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Related Documents
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Supported Platforms
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Determining Platform Support Through Cisco Feature Navigator
Cisco IOS software is packaged in feature sets that support specific platforms. To get updated information regarding platform support for this feature, access Cisco Feature Navigator. Cisco Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.
Cisco Feature Navigator is a web-based tool that enables you to determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image. You can search by feature or release. Under the release section, you can compare releases side by side to display both the features unique to each software release and the features in common.
To access Cisco Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions at http://www.cisco.com/register.
Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and technology releases occur. For the most current information, go to the Cisco Feature Navigator home page at the following URL:
Availability of Cisco IOS Software Images
Platform support for particular Cisco IOS software releases is dependent on the availability of the software images for those platforms. Software images for some platforms may be deferred, delayed, or changed without prior notice. For updated information about platform support and availability of software images for each Cisco IOS software release, refer to the online release notes or, if supported, Cisco Feature Navigator.
Supported Standards, MIBs, and RFCs
Standards
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MIBs
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To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB web site on Cisco.com at the following URL
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtmlRFCs
No new or changed RFCs are supported by this feature.
Prerequisites
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Configuration Tasks
None
For information about configuration, refer to the following documents:
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Configuration Examples
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Command Reference
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Glossary
CLI—command-line interface.
CSMv6—Mindspeed modem hardware solution.
DFC—dial feature card.
DSP—Digital Signal Processor. Microprocessor on which the modulation/demodulation process is carried out.
ISP—Internet service provider.
ITU-T—International Telecommunication Union Telecommunication Standardization Sector.
LZJH—Lempel-Ziv-Jeff-Heath data compression algorithm used in V.44.
MOH—Modem on Hold functionality specified in V.92.
NextPort—Device driver architecture for Cisco IOS software that supports the NextPort hardware and software interfaces. Supports the universal port concept.
PCM—pulse code modulation.
PSTN—Public Switched Telephone Network.
QC—Quick Connect functionality specified in V.92.
universal port—Concept of a single device that can terminate one digital signaling level zero (DS-0) with a data modem, fax modem, ISDN, or voice solution.
V.44—ITU modem standard for LZJH data compression algorithm.
V.92—ITU modem standard that contains Quick Connect and Modem On Hold.
Guest
