NGN (Next Generation Network) is a milestone of the telecommunication history, it mean the new era of the telecommunication network.
即下一代网络，它是电信史一块里程碑，标志着新一代电信网络时代的到来。
SIP gradually becomes the important protocol in the multimedia Softswitch system and 3g multimedia subsystem area of the next generation network (NGN).
SIP协议已逐步成为下一代网络(NGN)的多媒体软交换系统和第三代移动通信(3 G)多媒体子系统域中的重要协议。
The convergence of the control layer of the next generation network (NGN) requires the call control model supporting the media control in heterogeneous network environment.
为了实现下一代网络在控制层的融合，需要具有支持异构网络环境媒体控制功能的呼叫模型。
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