GB/T 7623-1987
ActiveAutomatic 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
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
Application Summary AI generated
This standard specifies the technical requirements and operational procedures for automatic answering and parallel automatic calling equipment used on the public switched telephone network (PSTN). It defines how echo control devices should be disabled during both manually and automatically established calls to prevent interference. The standard is applied in telecommunications equipment design and testing, particularly for modems, fax machines, and other devices that automate call handling on analog telephone lines.
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