如建议ITU-T F.703[2]所定义，总对话是一个网络中三种媒体的组合 对话通话:视频、实时文本和音频。ETSI TS 101 470定义了使用总计的条件 与常规语音通话相比，与更多媒体的紧急服务对话提供了更多 与普通语音紧急情况相比，快速、可靠、自信地解决紧急服务案例 呼叫，尤其是为了使紧急服务能够进入或使其对可能需要紧急服务的人更有用 由于听力、言语或其他人类交流方面的障碍，很少或根本不使用语音电话 功能。本文件阐述了公共安全应答点（PSAP）的组织和潜在影响 关于应急服务的整体组织，以处理全部通话。 本文件还包括: 解决与PSAP接口、与外部支持服务的连接相关的功能要求， 呼叫处理组织之间的呼叫转移和共享、呼叫记录和呼叫记录 PSAP、PSAP回拨方面以及这些方面的具体呼叫路由和位置信息提供方面 对话电话。本文件引用了与全对话用户终端相关的现有标准 以及为网络提供服务，以促进紧急呼叫的全面对话。本文件并不意味着 对用户终端的要求通常为总的对话终端。此处指定的服务是为满足欧盟要求的无障碍应急服务提供的一种解决方案 普遍服务指令[i。 1] 和[i.2]。本文件并不排除其他可能的解决方案 并且可以指定和实现。适当考虑了相关的标准化（如3GPPTM和IETF）和其他机构（如专家）的工作 紧急通道小组（EGEA）和欧洲紧急号码协会（EENA）。

Total Conversation, as defined in Recommendation ITU-T F.703 [2], is a combination of three media in a conversational call: video, Real-Time Text and audio. ETSI TS 101 470 defines conditions for using Total Conversation for emergency services with more media than in the regular voice call providing opportunities to more rapid, reliable and confidence-creating resolution of the emergency service cases compared to plain voice emergency calls, and especially for enabling access of emergency services or making them more usable for those persons who may have little or no use of voice telephony because of disabilities related to hearing, speech or other human communication functions.The present document addresses the organization of Public Safety Answering Points (PSAP) and the potential impact on overall organizations of emergency services for handling Total Conversation calls. The present document also addresses functional requirements regarding the interface to the PSAP, the connection to external supporting services, the transferring and sharing of the call between call handling organizations, the call logging and call recording at the PSAP, the PSAP call back aspects and specific call routing and location information provision aspects for these Total Conversation calls. The present document refers to existing standards relevant for Total Conversation user terminals and serving networks to facilitate a Total Conversation emergency call. The present document does not imply any requirements on user terminals in general to be Total Conversation terminals.The service specified here is one solution for accessible emergency services intended to fulfil requirements in the EU Universal Service Directive [i.1] and [i.2]. The present document does not preclude that other solutions may be possible and can be specified and implemented.Due consideration is taken of related standardization (e.g. 3GPPTM and IETF) and work in other bodies (e.g. the Expert Group on Emergency Access (EGEA) and the European Emergency Number Association (EENA)).