Abstract
VoIP (Voice over IP) is a rapidly growing area with great market potential. To promote it for both commercial and research purposes, a prototype VoIP system based on state-of-the-art Motorola communication techniques has been developed. It is a gateway system integrating a PBX and a VoIP module. All components that H.323 defines to support VoIP are implemented in the VoIP module, though in a simplified manner. As an embedded system, the system features realtimeness and task distributiveness. A number of additional techniques are used to improve the performance, including noise suppression, zero copy, and buffer structure optimization. When refined in interoperability, the system will also readily serve as a product.
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Xiang Yangzhao, Liu Xicheng. An overview of VoIP technology and systems.Chinese Computer World Weekly, January 25 1999, (4).
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/voice/index.htm
http://www.iptelephony.com
ITU-T Recommendation H.323 — Packet-Based Multimedia Communications Systems, 1997.
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Networking and Computing Systems Group, Motorola Semiconductor Products Sector
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Liu, X., Li, T.J. Implementation of a prototype VoIP system. J. Comput. Sci. & Technol. 15, 480–484 (2000). https://doi.org/10.1007/BF02950412
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DOI: https://doi.org/10.1007/BF02950412