IP multimedia Subsystem (IMS) is a set of specifications that describes the Next Generation Networking (NGN) architecture for implementing IP based telephony and multimedia services.

IP多媒体子系统(IMS)是一组规范，描述用于实现基于IP的电话和多媒体服务的下一代网络(NGN)体系结构。

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These applications securely integrate IP telephony with business applications and corporate data on any IP device, including IP phones, mobile devices and PCs.

这些应用可能使用任何IP设备，例如IP电话、移动设备和PC，利用业务应用系统和协同的数据来安全地整合IP电话技术。

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Also, many of the IP telephony vendors are now focused on SIP as the control protocol for their IP telephony deployments.

另外，许多IP电话技术供应商现在都把SIP作为IP电话技术部署的控制协议。

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Technologies that let an IP-based telecommunications provider offer IP telephony services commensurate in quality to the traditional switched circuit providers, or at least as good a quality as cell phone providers can offer, are now getting close to being finalized by the Internet Engineering Task Force.

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The product can also be used in IP telephony devices and cable modems, the company said.

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But among investors and vendors of emerging technologies such as IP telephony, expect a very different reaction--and concern about the future.

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