�1���� General
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DCE/DTE interface
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Signalling
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Modes of operation � Timing diagrams
Annex A� �� Automatic call by DTE
Annex B� �� Automatic call by DTE
Annex C� �� Teleprinter + DTE
Annex D� �� Answering by DTE
Annex E� �� Teleprinter answering
References