000			00355nam a2200157Ia 4500
008			220709s9999 xx 000 0 und d
082			_a621.38 _bVIS
100			_aVISWANATHAN THIAGARAJAN
245		0	_aTELECOMMUNICATION SWITCHING SYSTEMS AND NETWORKS
250			_a2
260			_bPHI
260			_c2020
300			_a620
942			_cREF
999			_c80879 _d80879