U.21�:�Operator recall on a telex call set up on a radiotelegraph circuit

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U.21�:�Operator recall on a telex call set up on a radiotelegraph circuit �

Recommendation U.21 (11/88)

Approved in 1988-11-25

Status : In force

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PDF (acrobat)

48404 bytes

1990-04-19

E�15357�

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PDF (acrobat)

55109 bytes

1990-04-19

S�15357�

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PDF (acrobat)

55495 bytes

1990-04-19

F�15357�

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32873 bytes

1990-04-19

E�15357�

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44860 bytes

1990-04-19

S�15357�

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43002 bytes

1990-04-19

F�15357�

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