000			00302nam a2200133Ia 4500
942			_cENGBV
520			_aIssue No.1-4,6-9,12
654			_aVoice
654			_aData
654			_aTelecommunication
245			_aVoice and Data
260			_aNational _bGupta, Pradeep. New Delhi _c2002-2003
440			_v9
999			_c40365 _d40365