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Digital Simultaneous Voice and Data (DSVD)

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Rockwell Telecommunications has announced Digital Simultaneous Voice and Data (DSVD) chipsets - enabling PC users to exchange voice and data over a single, standard phone line. The chipsets are compliant with the recently announced DSVD Protocol Specification, a market-based standard developed by PC and modem industry leaders.

Announced by Rockwell, with support from Intel Corporation, Creative Labs, Hayes Microcomputer and U.S. Robotics, the DSVD specification was developed for modems to eliminate the need for two separate phone lines when using collaborative PC-based applications such as personal conferencing, technical support and multi-user computer games.

"The primary goal of creating a standard DSVD specification is to establish broad interoperability," said Armando Geday, business director for Rockwell Modem Systems. "All modems compliant with this specification will communicate with one another. It is Rockwell's intent to aggressively deploy DSVD functionality by providing modem OEMs with complete, lowest-system-cost solutions."

What Can You Do With DSVD?

Have you ever promised someone on the telephone that you'd fax a document to them, then forget to send it?

Have you ever traveled cross-country or halfway around the world to make a presentation?

Have you considered expensive video conferencing hardware and applications as a way to communicate?

Ever been frustrated waiting online, hoping to get some technical support?

With DSVD technology from Rockwell, you'll be able to turn these problems into time and money saving opportunities. DSVD enables PC users to exchange voice and data at the same time, over a single, standard phone line.

With a DSVD modem as part of your PC's configuration you'll be able to place a standard telephone call to a colleague or customer and exchange data or fax transmissions with them without having to place a subsequent call or requiring a second telephone line. Imagine the follow-up calls you will be able to avoid, plus the time and money you'll save. In addition, your telephone will now be part of your PC. Your computer will store all your important telephone numbers and dial them at the click of a mouse.

When you need to work on a project, spreadsheet or presentation with someone from another location, a DSVD modem lets you do it without leaving your office or requiring costly video conferencing equipment. Both parties can simultaneously collaborate on a shared document, each viewing and discussing the additions and modifications made. This can slash time and money previously wasted exchanging faxes and relying on overnight express mail deliveries.

A DSVD modem also provides for online technical support and interactive PC shopping. While you're on a telephone call with a computer-based technical support person, they will be able to troubleshoot your PC or software problems and immediately transfer application updates or fixes, without having to call you back or mail you a diskette.

Computer and software demonstrations can be easily conducted through a DSVD modem. This is a great way to highlight or test market new features and get immediate customer feedback. For the computer company, DSVD means fewer support follow-up calls and lower telephone bills. And the customer is given immediate value-added service and support.

With a DSVD modem, you will be able to dial your favorite online catalog showrooms, browse the aisles, ask a salesperson a question or two, then place an order. Unlike other online "malls", with DSVD the human interface is still intact. While you're interactively shopping you can talk with salespeople or even other shoppers, just like the real mall.

And when it's time to relax or use your computer for fun, DSVD can enhance every experience. A new dimension will be added when you can actually speak to your opponent while playing a challenging board game or trying to out-gun them in a fast-action role playing or arcade style game.

With DSVD your computer will never sound the same again.

What Exactly is DSVD?

DSVD is an open, PC-platform standard for sharing digital voice and data over a single analog phone line. A key feature of the technology is the flexibility it allows for future enhancements, including modem data rates, digital speech processing and video conferencing.

"The increased data throughput enabled by V.34 modem technology and the DSVD standard combine to provide a foundation for interactive communications," said Patrick Gelsinger, vice president and general manager, Intel Corporation, Personal Conferencing Division. "We believe that every V.34 modem should include DSVD in the future."

Rockwell's chipset, the RC288ACi/SVD, combines Rockwell's modem and DigiTalkª speech compression technologies to provide a complete system solution for DSVD applications. The DigiTalk codec Ñ Rockwell's voice compression/decompression engine Ñ has been recommended as a speech compression algorithm for DSVD products, and provides the highest quality voice at the lowest bit rates.

The DigiTalk codec low bit rate voice compression allows users to carry on normal conversations over the PSTN, while transmitting data at speeds as high as 19.2kbps. With the incorporation of a silence detection and deletion feature, the RC288ACi/SVD is able to detect periods of silence and shift to higher data rates (up to 28.8Kbps), maximizing data throughput for each call while optimizing voice quality.

Rockwell's DSVD chipsets open up new applications for V.34 (28.8Kbps) modems, including:

Personal conferencing - End-users can place

standard telephone calls and speak to other PC users while sharing and

manipulating charts, graphs or reports without terminating the voice call.

Technical support - End-users can gain

assistance from technical support experts by running remote-control applications, allowing support engineers to fix problems or demonstrate correct


Multi-user computer games - End-users can

have full interaction with other game players without having to be in the same room, same state or even same country.

Home shopping - End-users can view a complete

selection of products while interacting with customer service representatives.

The RC288ACi/SVD supports V.42/MNP 2-4 error correction, V.42bis/MNP 5 data compression, EIA/TIA 578 Class 1/2 and T.30 facsimile protocol, and satisfies ITU (formerly the CCITT) recommendations from V.34 and V.32bis down to V.23, while supporting connectivity with all V.FCª-based modems. The device's error correction and data compression can support throughputs as high as 115.2Kbps. The device also satisfies V.21 international standards and supports the Bell 212 and 103 specifications for the U.S. Facsimile functions support Group 3 send/receive transmission speeds from 14.4 kbps down to 2.4 kbps and meet CCITT V.17 recommendations.

See Also