personal interviw , then 2 rounds of technical interview , they are checking your grammer and voice quality... overall easy and be loud during interview.. they are also asking question on networking and operations , LAN,MAN,WAN basics.......

By the way if you are graduate in B.E then it's 3 rounds and if you are non B.E graduate then it's 5 round. 1 Personal Interview 2 Typing speed (they used typing master software for checking speed) 3 Aptitude (No maths Question & no verbal question, they will ask you about internet related technology, I will tell you about this later) 4. Email Writing( They will give you some role and you have write mail. for example you are the Manager of BSNL and a customer repeatedly complaining about slow broadband, how will you write mail to him ?) 5. HR(He can ask you about any thing like your hobbies. and he do check about your grammar and pronounciation) B.E graduates has not to give Round 2,4. I don't know why.