SIP is widely used in various areas, such as remote education, IP soft phone, multimedia conference and multimedia distribution.

SIP协议已经广泛地应用于远程教学、IP电话、多媒体会议和多媒体分发等领域。

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Huawei IAD (Integrated Access Device) provides 8-32 phone channels, transferring the information at phone terminals to IP packages to perform the soft switch and billing management system via RS232.

华为IAD可以提供8 - 32路电话终端连接，将电话终端的信息转换成IP包，在NGN上实现软交换，并将计费信息通过RS232传给计费系统。

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