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Author | ITU |
---|---|
Editor | ITU |
Document type | Standard |
Format | File |
ICS | 33.040.30 : Switching and signalling systems
|
Number of pages | 45 |
Year | 1990 |
Document history | |
Country | International |
Keyword | CCITT Q;CCITT Q Supplement 21;ITU-T Q;ITU-T 21;21;ITU-T Series Q Supplement 21;ITU-T Q Supplement 21 |