Automatic answering equipment and general procedures for automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls
自动应答设备和通用交换电话网络上自动呼叫设备的一般程序 包括手动和自动建立呼叫的回声控制设备禁用程序

1996-10-18

Automatic answering equipment and general procedures for automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls
自动应答设备和通用交换电话网络上自动呼叫设备的一般程序 包括手动和自动建立呼叫的回声控制设备禁用程序

1996-10-18

在电话自动交换网上的自动应答设备和（或）并行自动呼叫设备， 包括人工和自动建立呼叫时使回波控制装置停止工作的规程
Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network， including procedures for bling of echo control devices for both manually and automatically established calls

1987-04-03