GB/T 7623-1987 Standard PDF file download ; GB/T 7623-1987 Standard english preview version download

GB Standard Code	GB/T 7623-1987
Standard Category	China National Standards
GB Standard English Title	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
GB Standard Chinese Title	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
Chinese Version Price	$15 USD per 50 pages
English Translation Price	About $15 per 1 page; Inquire us for detail price

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