VoCAL Technologies sharpens 56K modem technology.BUFFALO, N.Y.--(BUSINESS WIRE)--April 7, 1997--VoCAL Technologies today announced that it has made several technical breakthroughs, which significantly improve the real-world performance of 56K modem technology. VoCAL, with scores of man-years of experience designing telephone systems and modem solutions for central office and remote sites, is submitting its second round of technology innovations to the TR30.1 committee (which has as its main purpose the formation of a 56K modem agreement) of the Telecommunication Industry Association (TIA (1) (Telecommunications Industry Association, Arlington, VA, www.tiaonline.org) A membership organization founded in 1988 that sets telecommunications standards worldwide. It was originally an EIA working group that was spun off and merged with the U.S. ) at its meeting this week in Norcross, Ga. The VoCAL innovations address issues of digital impairment, spectral shaping, and non-linear distortion and promise to improve the performance and robustness of modems using either the Lucent/Rockwell "K56flex" or the US Robotics US Robotics - U.S. Robotics, Inc. "X2" approach to digital modems. In addition, complete V.PCM solutions for communications OEMs will be available from VoCAL at the Spring Comdex show in Atlanta (June 1997). "The 56K modem situation is a sorry state of affairs," claimed Dr. Victor Demjanenko, chief software architect and theoretician the·o·re·ti·cian n. One who formulates, studies, or is expert in the theory of a science or an art. theoretician Noun at VoCAL, "complicated by over-hyped marketing, underperforming products, lack of delivery, delays, and subterfuge sub·ter·fuge n. A deceptive stratagem or device: "the paltry subterfuge of an anonymous signature" Robert Smith Surtees. of the time-honored data communications data communications, application of telecommunications technology to the problem of transmitting data, especially to, from, or between computers. In popular usage, it is said that data communications make it possible for one computer to "talk" with another. standards setting process. VoCAL hopes our participation in and submissions to the TR30.1 committee can help break the deadlock and improve the performance for all end users." VoCAL's experience in the telephone network industry has led the company to take a different view of pulse code modulation pulse code modulation: see modulation. See PCM. (data) Pulse Code Modulation - (PCM) A method by which an audio signal is represented as digital data. . The company's contribution to the TR30.1 committee, embedded in FIVE separate proposals submitted in the Norcross meeting, provides a means to determine and adapt to various digital network impairments with every call. Overcoming these impairments, which include digital attenuation Loss of signal power in a transmission. Attenuation The reduction in level of a transmitted quantity as a function of a parameter, usually distance. It is applied mainly to acoustic or electromagnetic waves and is expressed as the ratio of power densities. pads of 3dB and 6dB, robbed bit signalling, PCM (1) See phase change memory. (2) (Plug Compatible Manufacturer) An organization that makes a computer or electronic device that is compatible with an existing machine. sample slips, and PCM code conversions, is crucial for optimal PCM modem See V.90. operation. The VoCAL procedure provides a mechanism for detecting the digital network attenuation affecting the line and for selection of a set of PCM symbols and a mapping distribution to compensate for the specific detected digital network attenuation. As a result of the systematic mapping process within the digital network, VoCAL's technical contribution reliably addresses the FCC (1) (Federal Communications Commission, Washington, DC, www.fcc.gov) The U.S. government agency that regulates interstate and international communications including wire, cable, radio, TV and satellite. The FCC was created under the U.S. power limitations and provides for the highest data throughput rates under any digital network attenuation situation. The incorporation of the VoCAL technique into the upcoming V.PCM standard will be straightforward and would allow for greater network coverage. "The end result is that more users will see more throughput closer to the promised 56K under real-world conditions," added Dr. Demjanenko. According to simulation tests run by VoCAL in its labs in Buffalo and Santa Clara, Calif., the typical V.PCM modem attains performance improvements of only 25% (40 kbps) over a V.34 modem under most real-world line conditions; with the VoCAL approach, this improvement soars to 60% (54 kbps). VoCAL is committed to the standardization process, which has been the foundation of success for the modem industry and for data communications in general. With customers in both the consumer and central-site side of the business, the Company is committed to supporting international standards once such standards are set by the appropriate governing bodies. All VoCAL-based solutions will be upgraded via software updates to be in compliance with the international standards once such standards are available. VoCAL Technologies is a leading supplier of V.34 modem technology and custom product design/integration services. The company's software solution has been ported to eleven different platforms from vendors in Japan, Europe, and North America and runs on DSP (1) (Digital Signal Processor) A special-purpose CPU used for digital signal processing applications (see definition #2 below). It provides ultra-fast instruction sequences, such as shift and add, and multiply and add, which are commonly used in math-intensive semiconductors from Analog Devices, the DSP Group, and others. CONTACT: VoCAL Technologies Michael Demjenanko, 716/688-4675 |
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