000			00610nam a2200205Ia 4500
005			20220306151158.0
008			180302s9999 xx 000 0 und d
020			_a9788120307131
082			_a621.382 _bT345t 1992
100	1		_aViswanathan, Thiagarajan
245	1	0	_aTelecommunication switching systems and networks
260			_aNew Delhi : _bPHI Learning, _c1992.
300			_a583 p. : _bill.
500			_aIncludes index
650		0	_aData transmission systems
650		0	_aTelecommunication system -- switching systems
650		0	_aTelephone systems
650		0	_aDigital networks
942			_cBK _2ddc
999			_c45 _d45