00802nam a22001817a 4500003000200000005001700002082001500019100002800034245006600062260003800128300000800166520023300174650003900407650004800446942000700494952010000501999001900601020260731153717.0  a384 09 SRE  aSreekanth, P. V.921247  aTelecom networks of digital era : a chronicle of developments  bIEEE Communications Societyc2025  a948  aThe book offers a comprehensive chronological analysis of how telecommunication systems evolved from fragile analog configurations into the highly resilient, intelligent digital infrastructures that power today's global economy.  aTelecommunication - History921248  aDigital communications - Development921249  cDB  00104070aLBSNAAbLBSNAAd2026-07-31l0o384 09 SREp173572r2026-07-31w2026-07-31yDB0x2  c361798d361798