voice-grade service

Voice service is temporarily unavailable. Calls cannot be completed at this time. We are working to fix these issues and apologize for the inconvenience.

语音服务暂时不可用。现在不能拨打电话。我们正在修复这些问题。对于给您造成的不便深表歉意。

IVR ( interactive voice response) system is one kind of telecom added value service system.

交互式语音应答（IVR）系统是一种电信增值业务系统。

But in the traditional customer service center system of PBX, various applied software is constructed on the commutation system, for example function of ACD, interactive voice response-IVR etc.

但是在传统的PBX客户服务中心系统中，各种应用软件是构筑在交换系统之上的，比如ACD功能、交互式语音应答系统IVR等；

This is the same voice search technology that they use in their free directory service, GOOG-411 .

这与谷歌用于其免费目录服务, 即GOOG -411 上的语音搜索技术是相同的.

Voice recorders were retrofitted into planes already in service.

录音设备安在了正在服役的飞机上。