VISWANATHAN THIAGARAJAN TELECOMMUNICATION SWITCHNING SYSTEMS AND NETWORKS TELECOMMUNICATION SWITCHNING SYSTEMS AND NETWORKS - - NEW DELHI PHI 2013 - 583 UNDER TEQIP PHASE - II ISBN: 9.78812E+12 Subjects--Topical Terms: COMMUNICATION TELECOMMUNICATION SWITCHNING Dewey Class. No.: 621.382 VIS / VIS