说明：  本白皮书分析了VoIP的性能和带宽要求，并介绍了扩展网络公司的加速器（Expand Networks ACCELERATORs）如何有助于提供所需的性能，而同时在集成网络中降低WAN的成本。
(VoIP analysis of the performance and bandwidth requirements, and expansion of the company's network accelerator (Expand Networks, ACCELERATOR s) can help provide the necessary performance, while the integrated WAN network to reduce costs.)