在移动网上，由于接入方式的限制，使得即时消息业务无法很好的开展；

Secondly, in the mobile network, because of the restriction of accessing method, IM service can't be developed very well.

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即时消息业务具有通信便捷和价格低廉等优点，是下一代网络中不可或缺的业务之一。

With features of nearly real time communications and low cost, instant messaging become so important services in NGN that it is necessary for Softswitch to provide basic ability of instant messaging.

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在文章最后，本文还给出了即时消息业务适配子系统的实现部分和对其进行的测试情况。

In the end of this paper, it is also described that how to implement the service adapter subsystem within instant messaging system, as well as how to test it.

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