ETSI TR 103 414包含TETRA中QAM信道扩展的研究结果，以在TETRA中传输语音 土生土长的举止。可预见到TETRA标准[i.1]迄今为止发生变化的领域，以增加这一点 功能是在一个较高的层次上描述的。注:本文件不足以根据[i.1]生成变更请求，以及 需要进行标准化工作才能找到解决方案。标准化解决方案可能不同于 本文件中提出的概念。本文件的主体部分描述了满足的要求和设想的机制 在这项研究中，可以实现TETRA的扩展。 附件A列出了一些可能的修改，这些修改可能会 [i.1]中规定的PDU和信息元素需要，附录B逐条提及[i.1] 指出哪些条款可能需要更改才能实施这些机制。

ETSI TR 103 414 contains the results of a study into the extension of QAM channels in TETRA to carry speech in a native manner. The areas where change can be foreseen to the TETRA standard [i.1] to date in order to add this functionality are described at a high level.NOTE: The present document is not sufficient to enable change requests to be generated against [i.1], and further standardization work would be needed to arrive at a solution. A standardized solution could differ from the concepts presented in the present document.The main body of the present document describes the requirements that are satisfied and the mechanisms envisaged within this study that could fulfil this extension of TETRA. Annex A presents some possible modifications which could be needed for PDUs and information elements specified in [i.1] and Annex B refers to [i.1] on a clause by clause basis to indicate which clauses could require changes in order to implement these mechanisms.