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The top documents tagged [telephony revenues]
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SONET
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Telephony Slide 1 ear T R mouth DTMF ringer C dial switch SLIC Telephone Subscriber Line CO (Local Exchange) cradle switch off-hook on-hook tip (+) ring
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Sonet
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SONET/SDH Yaakov (J) Stein Chief Scientist RAD Data Communications
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SONET
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Lecture #2 (Standards) S2-2014-2015
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