| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GA/T 379.9-2002 | English | 239 |
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Days<=3
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Message formats and protocols for serial data interfaces in alarm transmission systems -- Part 9: PTT interfaces for dedicated communications channels using ITU-Trecommendation V.23 signalling
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GA/T 379.9-2002
| Obsolete |
GA/T 379.9-2002
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