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Implementation of a prototype VoIP system

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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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References

  1. Xiang Yangzhao, Liu Xicheng. An overview of VoIP technology and systems.Chinese Computer World Weekly, January 25 1999, (4).

  2. http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/voice/index.htm

  3. http://www.iptelephony.com

  4. ITU-T Recommendation H.323 — Packet-Based Multimedia Communications Systems, 1997.

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Correspondence to Liu Xicheng.

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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

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