VoIP (Voice over IP) is a kind of Voice shall be transmitted by the Internet technology, with the development of Internet technology and grows, it will be well Voice technology and the integration of network transmission, fully play the role of the Internet, to the construction bank in east China's zhejiang province AS an example, this paper introduces how to use the Cisco router to achieve VoIP, provincial branch needs to handle more Voice, fax service, so choose capacity bigger Cisco AS 5300 general access servers, each branch of urban land consolidation use Cisco 3640 router, configure corresponding Voice module, on the Voice module can depending on the type of signal Voice port insert the corresponding Voice interface card,
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