Details, datasheet, quote on part number: CX20468
CategoryCommunication => Modems => Low-speed Modems
DescriptionHsfi Pci Software Modem Device
CompanyConexant Systems, Inc.
DatasheetDownload CX20468 datasheet
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Features, Applications

Soft Modems Complete Portfolio, Full Features, Low Cost

Conexant's line of software modem solutions are proven, reliable products with cumulative shipments exceeding 31 million units to over 60 countries worldwide. Drawing on Conexant's history in modem technology development, we deliver the latest V.92 features to enhance the end user 's Internet experience.

Conexant's low-cost soft modem solutions support a wide range of platforms, including: PCI Desktop Mini-PCI Notebook AC-LINK MDC Notebook AC-LINK AMR/CNR/ACR Riser Card USB Desktop/Notebooks

Conexant supplies both the silicon and the software drivers for all these solutions, ensuring complete one-stop technical support and total legal indemnity for all V.92-related patents. The company's WindowsTM based ModemXpertTM diagnostic application addresses common problems like no dial tone, low data throughput, no connects and dropped connections, preventing costly returns of properly functioning modem boards.

Available in USB, PCI, Mini-PCI and AC-Link Supports AMR, MDC, ACR, and CNR platforms Incorporates Conexant SmartDAA technology ModemXpertTM Windows-based diagnostics software ITU V.92 ready Faster connection times NetWaitingTM application compatible for modem-on-hold USB Desktop/Notebooks

All Conexant AC-LINK soft modems incorporate the cost-efficient, world safety certified, feature-rich SmartDAA technology to ensure smooth, trouble-free operation.

V.92 is the new dial-up modem specification from the ITU (International Telecommunications Union) which incorporates exciting new features: Quick connect Modem-on-hold V.44 compression PCM (high-speed transmission) upstream

V.44 compression is a new compression algorithm for faster download of popular HTML content from the Internet achieving downloads about 30% faster for a more pleasant end user experience.

Conexant's proprietary SmartDAA technology eliminates the need for costly relay and opto-isolators typically used in discrete DAA implementations. The SmartDAA provides all of the interface circuitry, off-hook relay, loop current holding, impedance matching and ring detection. It is designed to meet both USA and international line interface requirements, with enough flexibility to meet all worldwide regulatory requirements. The PC Host system-powered (via the PCI and AC-LINK bus) SmartDAA operates reliably without drawing power from the telephone line. Line-powered DAAs operate poorly when the line current is insufficient because of long lines or poor line conditions. SmartDAA delivers a host of features, including: Call-waiting detection Extension pickup detection Line-in-use detection Remote hang-up detection European Handset Exclusion SmartDAA technology consists of three components. A system side device (System PCI or AC-LINK interface), a Digital Isolation Barrier (discrete components, high-voltage barrier) and a Line Side Device (CODEC, hybrid, line protection and DC loop).

Quick connect shortens the time to make a connection by remembering ("training") the phone line characteristics and storing them for future use. Typically, the modem "handshake" to make a connection takes from to 27 seconds. Quick connect will cut the handshake time by 50%, averaging 13 seconds for most calls.

Many households use the same phone line for voice and Internet. When a user is browsing the Internet and incoming call either cannot get through or it interrupts the user 's connection. Modem-on-hold allows users to receive an incoming call and stay connected to the Internet. Conversely, users can initiate a voice call and still keep their modem connection.

NetWaiting is bundled with the V.92 modem chipset and driver. It offers a host of customizable features that brings full functionality to the modem-on-hold feature.

PCM upstream boosts the data rates between the user and the Internet to reduce upload times for large files and email attachments. A maximum of 48 Kbps upstream rate, a 40% improvement achieved. PCM upstream works particularly well with new equipment such as Internet-connected digital cameras, which primarily upload rather than download information.

As a worldwide modem leader, Conexant has been in a position to investigate many of the most common user problems. The SmartDAA was designed to help solve these problems.

Long Telephone Loops Suffering from Low-Voltage Signals

Modems which draw power from the telephone line often suffer from reduced performance on long telephone loops. The SmartDAA Solution

Running in the background as a real-time system tray application, ModemXpert automatically detects communication problems and alerts the user. This Windows-based diagnostic program comes as an option with Conexant products and easily guides the user to a quick resolution. Technical support calls are reduced and in many cases avoided altogether. Customer returns are also significantly reduced. ModemXpert enhances the value of the modem by increasing customer satisfaction. Fewer technical support calls and customer returns add dollars to OEM profits.

SmartDAA uses system-wide power, guaranteeing operation on any loop. Thus, low-voltage signals are not negatively impacted by the power needs of the modem.

The SmartDAA Solution The use of differential digital interface acts to cancel such noises.

Incessant humming plagues the telephone line when the modem is plugged in but not being used. The SmartDAA Solution SmartDAA minimizes the capacitance across the isolation barrier to eliminate hum noise.

Digital Isolation Barrier System Side 1010101010101 Line Side PCI Bus System Interface DIB Interface Discretes

The modem system is disrupted or damaged due to lightning surges. The SmartDAA Solution SmartDAA designs have been shown to pass with 5KV surge pulses ranging from to 10x1000 uS, along with added protection from longitudinal surges. Such problems have rarely been an issue for our

Digital Isolation Barrier System Side 1010101010101 PCI Bus Line Side

PTT, Safety and EMC regulations vary widely and can change often. The SmartDAA Solution Conexant has designed SmartDAA to be flexible and easy to modify. It is fully configurable and allows many changes and optimizations. Additionally, Conexant has a solid network of relationships with PTT labs around the world and a test laboratory accredited to TBR21 and Advisory Notes.


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