| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 7431-1987 | English | RFQ |
ASK
|
Days<=3
|
Transmission objectives and their testing methods for crossbar local automatic telephone exchange
|
GB/T 7431-1987
| Obsolete |
GB/T 7431-1987
|