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: R.57 |
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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) |
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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