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: Q.522 (11/88) |
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| Q.522 : Digital exchange connections, signalling and ancillary functions |
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Recommendation Q.522 (11/88)
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Approved in 1988-11-25
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Status : In force
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Replaces Q.503 (1984) and Q.513 (1984)
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Access : Freely available items
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Format |
Size |
Posted |
Article Number |
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| English |
 PDF (acrobat)
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143683 bytes |
1990-01-04 |
E 12131 |
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| Español |
PDF (acrobat)
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188526 bytes |
1990-01-04 |
S 12131 |
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| Français |
PDF (acrobat)
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195189 bytes |
1990-01-04 |
F 12131 |
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Word 