Very straight forward and highly technical to test your understanding of your field. Interviews are first conducted with your line direct supervisor and then your Line manager before you get to meet HR

Technical Q&A What is ISUP protocol? 2. Why CPG message is required in ISUP protocol? 3. If RF power is good then what is the best Rx and Tx power? 4. What do you mean by TSCM? 5. Which frequency is used in voice sampling? 6. What is SS-7 signaling system? 7. Where memory is allocated for variables in a program? 8. What are various statuses of kernel? 9. What is the maximum decimal place which can be accommodated in a byte? 10. How personal computer can act as terminal? 11. How connection is established in Datagram? 12. What is the time for 1 satellite hop in voice communication? 13. What is the maximum number of satellite hops allowed in voice communication? 14. How many channels a 2MB PCM (pulse code modulation) has? 15. What action is taken when the processor under execution is interrupted by a non-mask able interrupt? 16. How much voltage is required in subscriber loop connected to local exchange? 17. How many T1 facilities the company needs between its office and the PSTN if it has 47 digital telephones, each operating at 64kbps?

I presented myself, I presented my motivation, I presented my capability to show why I was there for the interviw, what I can do for addition values for the enterprise Then the recruitor asked me some questions,