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ITU-T Q.7
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ITU-T Q.7
Signalling systems to be used for international automatic and semi-automatic telephone workingMore info
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.040.40 : Data communication networks
|
| Number of pages | 6 |
| Year | 1980 |
| Document history | |
| Country | Switzerland |
| Keyword | CCITT Q.7;ITU-T 7;7 |