ETSI EN 301 248:1999
数字蜂窝电信系统（第二阶段）；增强型全速率（EFR）语音业务信道的不连续传输（DTX）（GSM 06.81 版本 4.1.0）

2014-04

数字蜂窝电信系统（第二阶段）；增强型全速率（EFR）语音业务信道的不连续传输（DTX）（GSM 06.81 版本 4.1.0） 是非强制性国家标准，您可以免费下载预览页

非常抱歉，我们暂时无法提供预览，您可以试试：免费下载 ETSI EN 301 248:1999 前三页，或者稍后再访问。

您也可以尝试购买此标准，
点击右侧 “购买” 按钮开始采购（由第三方提供）。

注意：点击下载后，生成下载文件时间比较长，请耐心等待......

适用范围: The Present document gives a description of the general baseband operation of Enhanced Full Rate speech traffic channels in the transmitter and in the receiver of GSM Mobile Stations (MS)s and Base Station Systems (BSS)s during Discontinuous Transmission (DTX). For clarity@ the description is structured according to the block diagrams in figures 1 and 4. Except in the case described next@ this structure of distributing the various functions between system entities is not mandatory for implementation@ as long as the operation on the air interface and on the speech decoder output remains the same. In the case of BSSs where the speech transcoder is located remotely in the Base Station Controller (BSC)@ the implementation of the interfaces between the DTX handlers and the Radio Sub System (RSS) as described in this EN together with all their flags is mandatory@ being part of the A-bis interface as described in GSM 08.60 (ETS 300 737) [13]. The DTX functions described in this technical specification are mandatory for implementation in the GSM MSs. The receiver requirements are mandatory for implementation in all GSM BSSs@ the transmitter requirements only for those where downlink DTX will be used.

ETSI EN 301 248:1999数字蜂窝电信系统（第二阶段）；增强型全速率（EFR）语音业务信道的不连续传输（DTX）（GSM 06.81 版本 4.1.0）