本文件是属于IPCablecom的多部分可交付成果。本部分（第4部分）规定了一个外形 应用程序编程接口、媒体网关控制器接口（MGCI）和相应的协议， 媒体网关控制协议（MGCP），用于从外部呼叫控制IP语音（VoIP）嵌入式客户端 控制元素。MGCP基于呼叫控制体系结构，其中呼叫控制“智能”位于外部 网关和由外部呼叫控制元素处理。如本文件所述，配置文件如下: 被称为网络呼叫信令（NCS）协议。附录B规定了对现有NCS扩展的访问 兼容的本地交换。本附录规定了NCS协议扩展到V5的映射。2.本文件附件F规定了用于传输计量脉冲的可选NCS组件。该多部分交付成果指定了IPCablecom，一组协议和相关元素功能需求。 这些都是为了提供高质量的服务（QoS），增强安全的IP多媒体时间关键 通过有线电视混合光纤/同轴（HFC）数据网络向消费者家庭提供通信服务。注1:IPCablecom在覆盖网络的网络上层结构框架中定义了一组文档 双向数据就绪有线电视网络，如ES 201 488[5]和ES 200 800[3]中的规定。 虽然IPCablecom产品线的初始服务产品预计为分组语音和分组视频， 长期项目愿景包括一大系列基于数据包的服务。这可能需要在未来，而不是未来 这不仅是精心的维护控制，也是对现有文件集的扩展。注2:本套文件旨在获得全球认可和适用性。因此，它是在 与其他地区和地区已经存在或正在制定的标准保持一致 国际电信联盟（ITU）。注3:IETF或ITU中也可能有针对欧洲用户需求的相关等效研究 IPCablecom。在可能的情况下，IPCablecom的ETSI TC AT-D工作组应与附录B保持一致 解决欧洲IPCablecom具体需求的附件包或类似包，包括 参加IETF、Cablelabs或ITU。

The present document is a multi-part deliverable belonging to IPCablecom. The present part (part 4) specifies a profile of an application programming interface, Media Gateway Controller Interface (MGCI), and a corresponding protocol, Media Gateway Control Protocol (MGCP), for controlling Voice over IP (VoIP) embedded clients from external call control elements. The MGCP is based on a call control architecture, where the call control "intelligence" resides outside the gateways and is handled by external call control elements. The profile, as described in the present document, is referred to as the Network Call Signalling (NCS) Protocol.Annex B of the present document specifies an expansion of the NCS protocol to emulate an Access Node of an ETSI compliant local exchange. This annex specifies the mapping of expansion of the NCS protocol to V5.2.Annex F of the present document specifies optional NCS components for the delivery of metering pulses.This multi-part deliverable specifies IPCablecom, a set of protocols and associated element functional requirements. These have been developed to deliver high Quality of Service (QoS), enhanced secure IP multimedia time critical communication services to a consumer's home over a cable television Hybrid Fibre/Coaxial (HFC) data network.NOTE 1: IPCablecom defines a set of documents in the framework of a network superstructure that overlays the two-way data-ready cable television network, e.g. as specified within ES 201 488 [5] and ES 200 800 [3]. While the initial service offerings in the IPCablecom product line are anticipated to be Packet Voice and Packet Video, the long-term project vision encompasses a large family of packet-based services. This may require in the future, not only careful maintenance control but also an extension of the present set of documents.NOTE 2: The present set of documents aims for global acceptance and applicability. It is therefore developed in alignment with standards either already existing or under development in other regions and in International Telecommunications Union (ITU).NOTE 3: There may also be relevant equivalent studies on-going in IETF or ITU specific to the needs of European IPCablecom. Where possible ETSI TC AT-D working group for IPCablecom should align annex B package annex or similar packages addressing the specific needs of European IPCablecom with work on going in IETF, Cablelabs, or the ITU.