| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YDN 021-1996 | English | RFQ |
ASK
|
Days<=3
|
(Interface Specification V5. 2 local digital switches and access network (internal standard))
|
YDN 021-1996
| Obsolete |
YDN 021-1996
|