div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentbharat-sanchar-nigam-limited-started-the-indian-telecom-revolution-in-1850-in-1990shtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Bharat Sanchar Nigam Limited€¦ · started the Indian telecom revolution in 1850 In 1990s BSNL took charge of the telegram services from the department of posts With SMSs emails loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsnetreader034viewer20220501195f4f49532afa395c63033da3html5thumbnails1jpg width=140 height=200 divdiv