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| R.57 : Standard limits of transmission quality for planning code-independent international point-to-point telegraph communications and switched networks using 50-baud start-stop equipment |
| In force components |
Number
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Title |
Status |
R.57 (11/88)
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Standard limits of transmission quality for planning code-independent international point-to-point telegraph communications and switched networks using 50-baud start-stop equipment
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In force
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