000			00647nam a2200217Ia 4500
001			62914
005			20250221160536.0
008			250214s9999||||xx |||||||||||||| ||und||
020			_a9788120307131
100			_aThiagarajan Viswanathan
245		0	_aTelecommunication switching systems and networks
260			_aNew Delhi
260			_bPHI Learning
260			_c1992
300			_axx, 583p.
500			_aIncludes bibliographical references and index
650			_aOptical fiber communication
650			_aSwitching systems Strowger Crossbar Time division
650			_aTelecommunication -- (Telephone) -- Networks
942			_cBK
999			_c78302 _d78302