| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 7623-1987 | English | 349 |
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Days<=3
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Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network, including procedures for disabling of echocontrol devices for both manually and automatically est
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GB/T 7623-1987
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GB/T 7623-1987
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