U.20�:�Telex and gentex signalling on radio channels (synchronous 7-unit systems affording error correction by automatic repetition)

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U.20�:�Telex and gentex signalling on radio channels (synchronous 7-unit systems affording error correction by automatic repetition) �

Recommendation U.20

In force components
Number	Title	Status
U.20 (11/88) �	Telex and gentex signalling on radio channels (synchronous 7-unit systems affording error correction by automatic repetition) �	In force

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