ITU-T P.340 FRENCH-2000
免提终端的传输特性和语音质量参数.系列P:电话传输质量.电话设备.本地线路网络.用户线路和设置.12号研究组.承保单:31/3/2004

Transmission characteristics and speech quality parameters of hands-free terminals

作废

ITU-T P.340 FRENCH-2000 发布历史

This Recommendation defines the generic transmission characteristics of hands-free terminals, whatever the applications or technologies integrated. In addition to the parameters that ensure performance levels equivalent to these of handset terminals (sensitivity values, response curves, etc.), it defines the parameters which have a bearing on conversation quality (gain switching characteristics, double-talk performances,etc.).It also defines categories of hands-free terminals based on the terminal's double-talk capability.

ITU-T P.340 FRENCH-2000由国际电信联盟 IX-ITU 发布于 2000-05-01。

ITU-T P.340 FRENCH-2000 在中国标准分类中归属于: M40 电话通信设备,M72 音响、电声设备。

ITU-T P.340 FRENCH-2000的历代版本如下：

• 2000年 ITU-T P.340 FRENCH-2000 免提终端的传输特性和语音质量参数.系列P:电话传输质量.电话设备.本地线路网络.用户线路和设置.12号研究组.承保单:31/3/2004
• 1996年 ITU-T P.340 FRENCH-1996 Caractéristiques de transmission des postes téléphoniques mains-libres

标准号

ITU-T P.340 FRENCH-2000

发布

2000年

发布单位

国际电信联盟

 

 

适用范围

This Recommendation defines the generic transmission characteristics of hands-free terminals, whatever the applications or technologies integrated. In addition to the parameters that ensure performance levels equivalent to these of handset terminals (sensitivity values, response curves, etc.), it defines the parameters which have a bearing on conversation quality (gain switching characteristics, double-talk performances,etc.).It also defines categories of hands-free terminals based on the terminal's double-talk capability.

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