Fax Modem Voice

GAO’s Soft-Modems for the Set-Top Box (STB)

Toronto, Canada – GAO Research Inc.  has launched its economical, flexible and reliable Soft-modem for Set-Top Boxes (STB). The soft-modems are designed to be compliant with specific ITU-T standards and yield comparable reliability and quality to traditional hardware modem chipsets. GAO’s soft-modems run on a DSP or microprocessor along with other control software and require an analog front-end.

GAO’s modular, re-locatable and reentrant soft-modems support multi-channel capability and improved for all common embedded hardware platforms. They are operating within a multi-tasking environment or as a stand-alone task and are optimized for fixed-point arithmetic. They support most commercial analog front ends (AFE) as well as various discrete DAAs with codes, depending on the application.

GAO’s soft-modems are the ideal solution for satellite STB units. The lower speed modems, using V.22 or V.22bis standards, provide a speedy hand-shaking process and a sufficient bit rate to complete the typical data transaction requiring relative low bandwidth within seconds. The higher-speed modems including V.34, V.90 and V.92, have maximum downstream data rates of 33.6kbps, 48kbps and 56kbps respectively. These high-speed modems are suitable for the transfer of data for interactive STB applications that require real-time response such as interactive gaming and Internet/email/IM access.

GAO’s high-speed soft-modems are typically deployed in high-end satellite STBs in order to support advanced interactive features, to meet desirable response times and higher bit rates..

About GAO Research Inc.

GAO Research Inc. is a recognized international leading provider of communications software to telecom and electronics companies and provides the most comprehensive and unique suite of modem, fax, telephony, speech software, VoIP, FoIP, fax relay and fax/modem/voice relay software for embedded applications for DSP and microprocessors.

About the Author

Gaoresearch., a member of GAO Group, is a leading provider of embedded development tools, telecommunication testers, electronic measurement instruments, video surveillance, alarm and other electronic products that serve the needs of electronic professionals internationally. For further information, please visit http://www.gaoresearch.com.

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Multi-Tech MultiModemZBA Data/Fax/Voice Modem $155.99 1" Height x 5.70" Width x 4.30" Depth 14.40 Kbps Fax V.90 2 Year 2 x RJ-11 56 56 Kbps Data Upload V.90 8 oz CE Mark EMC: EN55024, FCC Part 15 Class B Safety: cUL, EN60950, UL1950 Telecom: CS03, FCC Part 68, TBR21 Other countries also included Includes U.S. power cord and RJ11 phone cable V.90/56K downloads (from V.90 servers) and 33.6K data rates for uploads or peer-to-peer transfers U.S. Caller ID reporting Remote configuration for centralized setup and management Phone number storage for automatic or DTR dialing Pass-through, fixed, and variable callback security Voice mail support and full-duplex speaker phone operation on voice models Global model with approvals in many countries for worldwide use Self-resetting lightning protection Small footprint and stackable design Flash memory for easy updates Multi-language data/fax software for Windows PC AT Command Set Class 1 Class 2 Data/Fax/Voice Modem External Group 3 ITU V.24 ITU-T V.34 ITU-T V.80 ITU-T V.90 MNP-5 MT5634ZBA-GLOBAL-NAM MT5634ZBA-GLOBALM Multi-Tech Multi-Tech Systems, Inc MultiModem MultiModemZBA Data/Fax/Voice Modem Serial The MultiModemZBA corporate user modems provide high-speed data transfer and fax capabilities for small businesses, telecommuters and SOHO users. Features like remote configuration, callback security and 2-wire leased line support set the MultiModemZBA apart from other basic desktop modems. In addition, it is approved for use in many countries around the world. This means one model can ship virtually anywhere. Voice Support www.multitech.com

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VoIP Voice and Fax Signal Processing $136 A complete and systematic treatment of signal processing for VoIP voice and fax This book presents a consolidated view and basic approach to signal processing for VoIP voice and fax solutions. It provides readers with complete coverage of the topic, from how things work in voice and fax modules, to signal processing aspects, implementation, and testing. Beginning with an overview of VoIP infrastructure, interfaces, and signals, the book systematically covers: Voice compression Packet loss concealment techniques DTMF detection, generation, and rejection Wideband voice modules operation VoIP Voice-Network bit rate calculations VoIP voice testing Fax over IP and modem over IP Country deviations of PSTN mapped to VoIP VoIP on different processors and architectures Generic VAD-CNG for waveform codecs Echo cancellation Caller ID features in VoIP Packetization—RTP, RTCP, and jitter buffer Clock sources for VoIP applications Fax operation on PSTN, modulations, and fax messages Fax over IP payload formats and bit rate calculations Voice packets jitter with large data packets VoIP voice quality Over 100 questions and answers on voice and more than seventy questions and answers on fax are provided at the back of the book to reinforce the topics covered throughout the text. Additionally, several clarification, interpretation, and discussion sections are included in selected chapters to aide in readers' comprehension. VoIP Voice and Fax Signal Processing is an indispensable resource for professional electrical engineers, voice and fax solution developers, product and deployment support teams, quality assurance and test engineers, and computer engineers. It also serves as a valuable textbook for graduate-level students in electrical engineering and computer engineering courses.

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