LEADING FIRMS RALLY BEHIND UNIFIED ITU SIMULTANEOUS VOICE DATA MODEM SPECIFICATION.NEW YORK--(BUSINESS WIRE)--May 13, 1996--A group of leading chip, modem and computer firms today committed to support a newly-established unified international standard for simultaneous voice and data See SVD. transmissions over analog phone lines. The pledge for standard-compliant future products follows the approval of the so-called V.70 specification by a committee of the International Telecommunications Union See ITU. (body, standard) International Telecommunications Union - (ITU) ITU-T, the telecommunication standardisation sector of ITU, is responsible for making technical recommendations about telephone and data (including fax) communications systems for PTTs and suppliers. (ITU (International Telecommunication Union, Geneva, Switzerland, www.itu.ch) A telecommunications standards body that is under the auspices of the United Nations. Comprising more than 185 member countries, the ITU sets standards for global telecom networks. ). The endorsement of the Digital Simultaneous Voice and Data (communications) Digital Simultaneous Voice and Data - (DSVD) A technique supported by some modems for multiplexing compressed speech with digital data for transmission over a normal telephone line. (DSVD (Digital Simultaneous Voice and Data) An all-digital technology for concurrent voice and data (SVD) transmission over a single analog telephone line. The DSVD V. ) standard by major industry players opens the door for new desktop applications like collaborative computing, in which multiple users share white boards, computer screens and other desktop applications while conducting two-way phone conversations. The manufacturers supporting the new unified DSVD standard include Cirrus Logic, Inc. (CRUS crus (krus) pl. cru´ra [L.] 1. leg (1). 2. a leglike part. crus ce´rebri ), Compaq Computer Corp. (CPQ CPQ Compaq CPQ Conseil du Patronat du Québec (Canada) CPQ Configure-Price-Quote CPQ Conseil de Presse du Québec (Québec Press Council, Canada) CPQ Companion Parrot Quarterly ), IBM (International Business Machines Corporation, Armonk, NY, www.ibm.com) The world's largest computer company. IBM's product lines include the S/390 mainframes (zSeries), AS/400 midrange business systems (iSeries), RS/6000 workstations and servers (pSeries), Intel-based servers (xSeries) (IBM), Intel Corporation (INTC INTC Intel (NASDAQ symbol) INTC Intercept INTC Interrupt Controller ), the Microelectronics Group of Lucent Technologies (LUC) (formerly AT&T Microelectronics), Motorola (MOT), MultiTech Systems and Sierra Semiconductor (SERA). The major milestone passed by DSVD in the formal standardization process makes it the leading technology covered by an ITU standard for transmitting voice and data simultaneously over V.34 modems. In addition to collaborative computing, in which participants share data while conversing, DSVD applications extend to such business uses as integrated voice/electronic mail and remote technical support. In consumer markets, DSVD supports interactive networked games and simultaneous Internet data retrieval and voice calls over the same phone line. "Standardization gives applications developers the incentive to commit resources and make use of this new technology," said Lisa Pelgrim, industry analyst at Dataquest. "The digitized voice aspect of DSVD will make it an excellent solution for users in LAN (Local Area Network) A communications network that serves users within a confined geographical area. The "clients" are the user's workstations typically running Windows, although Mac and Linux clients are also used. environments where there is a need to pass the voice on digitally." DSVD modems require no specially-written applications yet they extend the capabilities of today's V.34 products to link the PC with an ordinary telephone line for greater productivity so that users can collaborate while manipulating information on a screen and converse on the same phone line. TECHNICAL BACKGROUNDER What DSVD (V.70) Modems Can (and Will) Do DSVD allows the simultaneous transmission of data and digitally-encoded voice signals over a single dial-up phone line. The voice quality is essentially the same as that provided over present phone lines. DSVD modems use for V.34 modulation (up to 33.6 kbit/sec), but may also use V.32 bis modulation (14.4 kbit/sec). The DSVD voice coder is a modified version of an existing specification and is defined as G.729 Annex A. The DSVD voice/data multiplexing scheme is an extension of the V.42 error correction protocol widely used in modems today. DSVD also specifies fallbacks that enable DSVD modems to communicate with standard data modems (i.e., V.34, V.32bis, V.32, and V.22). DSVD modems reserve eight kbit/sec for voice transmissions. The remaining bandwidth is available for data transmission. Along with V.70, which specifies the system-level framework for DSVD, the International Telecommunications (ITU) Study Group 14 also approved the V.75 Recommendation, which specifies DSVD control procedures, and the V.76 Recommendation, which defines DSVD multiplexing procedures. V.70 specifies G.729 Annex A, a voice coder determined in ITU Study Group 15, as the DSVD voice coder. ITU-T See ITU. ITU-T - International Telecommunications Union Study Group 15 is expected to formally approve G.729 Annex A in May, 1996. The ITU also approved V.8bis as an element of V.70 to provide the start-up procedure that is particularly important to simultaneous voice/data terminals. Also under consideration are a voice detection capability that will enable DSVD modems to utilize the full 33.6-kbit/sec V.34 bandwidth for data transmission during periods of silence, and a wide-band voice coder that will enable DSVD modems to transmit FM-quality music. CONTACT: Cirrus Logic - Connie Duncan 510-226-2346 Compaq - Hedy Baker 713-514-0484 IBM- Kathleen Ryan 914-892-5582 Intel - Donna Loveland 503-264-6281 Motorola - Trish Perry 205-430-7080 Lucent Technologies - Sam Gronner 908-508-8226 MultiTech Systems - Paul Kraska 612-785-3500 Sierra Semiconductor- Ward Pitkin 408-263-9300 |
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