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1992
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1991-12-11
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OCR:
3.2 Outgoing analogue seizure clear forward tf answer clear back circuit free biockina CCITT- 56010 List of timers: T1 Recommendation Q.412 is 2.2.2.7} T5 100 ms Recommendation Q.412 2.2.2.1) Automatic restoration ot an abnormally blocked circuit Recommendation Q.490 (s 6.6) number of attemnts made T4 : 30 s to tn T7 : 2 to 3 blocking numher attempts
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